He is also a huge fan of Claremont-era X Men, and has stated in some interviews that he based the character of Buffy Summers at least in part on Kitty Pryde. Word is that when Joe Quesada asked him to write "Astonishing X-Men", Whedon's main demand was that he wanted to write Kitty as a main team member.
Not to mention he was a fanboy of Doctor Who back when he was three, and it was his desire to play the Doctor that led him to acting in the first place.
Stephen Colbert is a huge fan of fantasy/SF, particularly Lord of the Rings (he read the novels long before the movies came out) and played Dungeons and Dragons in high school. He also owns a replica of Captain America's shield, which can be seen on his show and, on finding out that Barack Obama collects comics, signed a copy of the Colbert-Spider-Man crossover for him. It is being kept on the Shelves of Honor until such time as Obama takes the bait and comes on the show to get it.
Some CNN reporters needed a stock image of Satan as the backdrop for their encouragement coverage of the 06/06/06 "hysteria." They used an illustration of the Balrog from a 1977 Lord of the Rings calendar, prompting Stephen to explain, "Devils and Balrogs are totally different. Devils are angels who refused to serve God and instead followed Satan into hell. Balrogs are Maiar who refused to serve Eru and instead followed Morgoth into Thangorodrim. Get your facts straight, CNN!" The best part? Stephen noticed it himself. He just happened to recognize the illustration because he has the calendar.
In this clip Stephen shows off some of his Lord of the Rings collection including a huge statue of Sauron, a replica of the ring of power, and a limited edition Lord of the Rings Pinball Machine
Not to mention the fact that David Tennant started acting just so he could play the Doctor some day! David Tennant has been asked for obscure information on Doctor Who several times and always comes up with the goods, once on a TV chat show to find the audience member worthy of asking him a question (the host's idea). Also, in his Diary footage on the DVDs you can see him with action figures from Star Wars in the background and a shelf full of The West Wing. Actually, just listen to his interviews, he is probably the eptimome of One of Us.
And he had a significant role in two seasons of The Guild!
Ronald D. Moore (best known for his reboot of Battlestar Galactica) was a Promoted Fanboy initially before he became a speculative fiction giant in his own right. Initially he got a writing gig on Star Trek: The Next Generation solely because he happened to be lucky enough to have a girlfriend who worked on the sets and who passed his fan script over to one of the actual writers. The rest, as they say, is history. He also has said in an interview that he was looking forward to Star Trek (2009), since it would be the first time in a long while that he's watching it as a fan and not a writer.
Simon Pegg seems have achieved the ultimate geek dream, both making an appearance in Doctor Who and having a role in Star Trek (2009). Edgar Wright is also getting to direct his own superhero movie in Ant-Man. But before that, the quite geeky Scott Pilgrim vs. the World.
Simon Pegg's own ultimate geek dream was when, after making Shaun of the Dead, George Romero asked him to take a cameo in Land of the Dead. It meant he couldn't take the role he'd originally been offered in Doctor Who, but as he put it in an interview, "When you've just spent three years of your life essentially writing a love letter to someone, you HAVE to come when they call you." (He eventually took a role later in the Doctor Who season.)
Masi Oka: The number of video game references stuffed into Heroes and the associated "alternate reality" portion of it might possibly have given this away. One gets the feeling Masi Oka would have specifically requested a time-traveling character, due to his love of Chrono Trigger -- or, possibly, as another reference to Jo Jo's Bizarre Adventure, which Heroes has quite a few of. At least some of that must be due to having Jeph Loeb (a well known comic book writer) as a co-writer for the show.
Before he was on Heroes, Oka was a digital effects artist for Industrial Light & Magic and among his credits are all three Star Wars prequel films. After he began his acting career in 2000, he juggled his two jobs until he had to quit his beloved job at ILM to star in Heroes.
Seth Green is a big Star Wars fan. No surprise there. He's also into video games, although he admits he sucks big time in any game ever made because he lacks the coordination. Guest stars in the music video for "Weird Al" Yankovic's White and Nerdy. That action figure collection Al's dancing in front of? His. And he's Joker, the pilot of the SSV Normandy, in the video game Mass Effect.
The action figure collection Al's dancing in front of actually "merely" consisted of a couple of figures that his Robot Chicken partner, Matt Senreich, happened to have lying in the back of his car. Seth's real collection is allegedly big enough to earn its own storage facility.
One can also tell by Robot Chicken that he certainly has quite the nerdly knowledge of video games to make jokes that gamers would get the most and if his newest project Titan Maximum is to go by, he's also a fan of Humongous Mecha series.
Patrick Stewart, Captain Picard, Professor X, and a classically-trained Shakespearean Actor, is a huge fan of the comic series Transmetropolitan. He wrote the introduction to one of the collections, and his production company offered to option the rights. He almost voiced Spider in an animated series, and then there's this:
Warren Ellis: "I know Patrick could nail Spider. So does Wendy [Stewart], who just cringes in those moments when Patrick begins to channel Spider, standing on tables and proclaiming Spider to be his role model and personal god..."
On that note, Ellis himself browses 4chan, which shouldn't really be too much of a shock to anyone familiar with his work.
Not to mention prolific voice-acting work with Anime dubs (Nausicaa and Steamboy springing to mind first).
When he first saw Red Dwarf on TV he thought it was plagiarising his show and whilst he was calling up his lawyer he started laughing; something The Next Generation would hardly make him do. Been a fan ever since.
This video shows him expressing his love for modern technology (except for Twitter) and his fear that if he starts playing video games he'll become addicted to them. If he's not confirmed as a nerd by now then this is the proof.
Eric Kripke, creator of Supernatural, is a huge fan of the Hellblazer comics, and he actually tried to get the character of John Constantine onto the show for an episode or two. That seems to have fallen through, so he created Castiel the BadassAngel.
Let's not forget the love for Good Omens, aka Crowley's cameo on Supernatural.
Jensen Ackles and Jared Padalecki, the stars of Supernatural, are the goofiest pranksters this side of Bart Simpson, and Jensen has admitted to looking at SupernaturalFanfic. Okay, considering the amount of Wincest fic out there, that explains the completely squicked-out look Jensen had on his face when Jared was describing the Slash Fic about them in the fandom-recursive Season 4 episode "The Monster at the End of this Book".
Summer Glau is said to like science fiction movies, and judging from the TV shows and films she's been in, one starts to suspect this is true. Apparently she was a big TNG fan and at a Star Trek convention she almost cried when she met Marina Sirtis. She's also apparently a DC comics fan (even showing up to conventions wearing comic shirts) and jumped at the chance to voice Supergirl in Superman/Batman: Apocalypse.
So, the fandom goes both ways (Bungie employees are well-known Firefly Fanboys and huge fans of him in particular, having one of the random things said in the tab be "Nathan Fillion returns our phone calls.").
How about the way he always refers to the Kardashians as the "Cardassians?"
Jon Stewart, in response to Fox claiming "Who knows what went on behind closed doors" when Obama met Hugo Chavez, said something along the lines of "And now marks Fox News moving from political commentary... to Fan Fiction."
Jon's also a gamer, and has talked about being a Mac user and playing Doom with one hand (so the other one can man a bong) in his standup. (See also the Dwayne "The Rock" Johnson entry below.)
Jon also made a number of (fairly accurate) Dungeons and Dragons references in response to Rumsfeld saying you couldn't just "wave a magic wand" and make everything better in Iraq. "Remember; you're either with us, or you're with the orcs."
Second-hand example- his son is a fan of Power Rangers, and Jon has thus made a few references to it on his show- once getting the chance to bring it up in context while discussing a political scandal that involved series creator Haim Saban, and also using phrases from Power Rangers Jungle Fury to psych himself up for election coverage.
Zachary Levi (Chuck) is practically glued to his own games console. So much so that he and fellow Chuck star Joshua Gomez Morgan Grimes ran up to Adam Baldwin squeeing at having heard his voice in a game.
One can only imagine the reaction they must have had to Yvonne Strahovski's role in Mass Effect 2.
Well, if either romanced Miranda... awkward.
Chuck did a Shout-Out to Mass Effect, by having Yvonne wearing a black catsuit & Talking about suicide missions.
Josh Gomez's real life older brother Rick Gomez voices none other than Zack Fair.
In his nightly news program, Keith Olbermann frequently quotes or alludes to Monty Python (and has had John Cleese as a guest more than once), and criticized dire right-wing projections concerning President Obama's budget as requiring truly staggering precognition: to wit, the projections extend through 2080, "seventeen years after we first make contact with the planet Vulcan" (according to Star Trek: First Contact). He also loves baseball and has one of the largest baseball card collections in the country. He also runs a blog for Major League Baseball
Not entirely surprising, since he started his broadcasting career as a TV sportscaster.
He usually introduces his Oddball segment by noting the anniversary of some obscure, often times nerdy piece of trivia. As well, during one particular clip featuring a home-made beer serving robot he quipped: "You just give the command and Optimus Prime here will pour you a cold one."
Rachel Maddow from the Rachel Maddow Show has a Moment of Geek segment on her political show.
She also wrote the opening to the Batwoman: Elegy trade paperback.
British TV presenter and radio DJ Jonathan Ross is a big comics fan. He auctioned his copy of Amazing Fantasy #15 for charity, presented a BBC documentary about Steve Ditko (which ended with him and Neil Gaiman finally meeting the artist), and also co-presented an award at the San Diego Comic-Con alongside (or should I say... face to face with) Neil Gaiman. His 1988 Channel 4 TV series The Incredibly Strange Film Show was a well-informed guide to international cult film directors - including Tsui Hark, Ray Dennis Steckler, and Ted Mikels - who were, in the pre-internet age, still obscure in the UK outside a tiny minority of film geeks.
He also hosted a BBC 3 show called Japanorama, which is exactly what it sounds like. And yes, it included interviews with various mangaka and Japanese film directors.
His Crowning Moment of Geekdom had to be the occasion, on his Friday night BBC 1 chat show, he convinced Ricky Gervais to do his embarrassing David Brent dance. Gervais was immediately mortified, prompting Wossy to quip: "I'm Superman, You're Mister Mxyzptlk and I just made you say your name backwards twice." Three audience members get it.
Also, Nazanin Boniadi (How I Met Your Mother): She has an Honors degree from UCI in Biological sciences; she also won the Chang Pin-Chun Undergraduate Research Award for molecular research involving cancer treatment and heart transplant rejection and was assistant editor-in-chief of UCI's medical newspaper.
Stephen Fry. Gadget addict, one of the first Mac owners in the UK (sharing his Apple obsession with his friend Douglas Adams). He also wrote a piece in Doctor Who Magazine claiming that missing the second episode of "An Unearthly Child" was the worst moment of his life and "nothing that has happened since has ever, or could ever, make up for it".
He is also purportedly the last surviving person to know the answer to Why 42?
Don't forget going out of his way to do a 25-th birthday tribute to the GNU project, suggesting that he may be an avid Linux user as much as he is an Apple fan.
She also used to contribute videos to The Escapist, and she's a co-star on The Angry Joe Show.
Richard Dean Anderson is a huge fan of The Simpsons and sprinkled references to the show throughout the majority of his run on Stargate SG-1. This culminated in a tit-for-tat guest star spot where Dan Castellaneta (Homer's voice actor) appeared on SG-1, and Anderson appeared on The Simpsons.
David Hewlett. The man is a complete Doctor Who nut, and has freely admitted to torrenting the shit out of the episodes as they appear (even namechecking Mad Martha at one point). In fact, the only reason he didn't launch at the role when Eccleston left was because he was already tied into Stargate Atlantis at the time. He's also previously run his own web design company, and is a self-confessed Linux nerd.
Another BBC DJ who's a comics fan is American-born Paul Gambaccini. How much of a comics geek? Enough that there's a character in The Flashnamed after him: Paul Gambi, tailor to Flash's Rogues Gallery. He and Jonathan Ross used to co-own a comics shop, on the site of the original Forbidden Planet shop.
Craig Ferguson, of The Late Late Show, is a self-proclaimed Doctor Who nut. He recently spent quite a bit of time nerding out about it with Chris Hardwick on the Nerdist podcast, including having an argument over Old School Daleks, and who is better, Matt Smith or David Tennant. (Ferguson prefers Smith.)
Recently, one of his guests was a Dalek. A friggin' DALEK. Awesome.
One of the writing staff of NCIS is most likely a Doctor Who nerd, as one episode has a member of the team comparing the inside of a trailer to the TARDIS.
Danica McKellar. Remember Winnie from The Wonder Years? She graduated summa cum laude from UCLA, majoring in mathematics, co-authored a scientific paper and has her name attached to the "Chayes-McKellar-Winn theorem". And judging from the covers for her books "Math Doesn't Suck", "Kiss My Math", and "Hot X: Algebra Exposed" (aimed at middle-school girls to encourage math proficiency), she's still pretty damn attractive.
According to the commentary track for TOW Ross Got High on the Season 6 DVD set, all six of the main actors/actresses on Friends are video game players. They would often play Playstation 1 games like Twisted Metal 2 (which made its way into that same episode) during breaks when shooting episodes.
Ephraim Ellis, who played abusive boyfriend Rick Murray on Degrassi the Next Generation, is a self-described theater nerd, and used to collaborate on a webcomic called The Stairwell.
All four members of The League of Gentlemen are huge horror fans. The DVD commentaries show how many subtle horror references are painstakingly used in their show.
Mark Gatiss in particular has presented a BBC 4 documentary on the history of horror films (each episode of which was followed by his favourite films from that particular era) and has written for and acted in numerous episodes of the new Doctor Who and co-wrote Sherlock which, despite being set in the modern day, is actually one of the most faithful adaptations of the original books.
John Rogers, creator of Leverage, is a huge nerd, as are various members of his writing staff. Just look at the aliases Hardison thinks up.
In addition to that, he's posted tales from a D20 Modern game he ran between projects to ENWorld, has contributed to Dungeons and Dragons books, and is now writing the D&D comic for IDW.
Colin Morgan of Merlin is a fan of Discworld and has mentioned in an interview that he'd love to play Mort if they ever adapted it.
Colin Morgan as Mort?! NERDGASM.
Adam Savage is a geek to rival all geeks. When he's booked at a convention, he sews his own costumes and spends the time he's not doing panels wandering around.
He's also known for making models for fun, including the most accurate reproduction of The Maltese Falcon.
Jim Halterman: (serious tone) When you’re working with Michael, what is energized?
Candice Accola: [laughs] We energize. We got it from the Star Trek remake. Whenever they’re getting ready to disintegrate [or teleport] they say ‘Energize!’ Whenever we’re in the mood to get a laugh or something we’ll both just give each other a little nod and go ‘Energize!’
Game show host Geoff Edwards, host of the video game-themed game show Starcade, said that he came to like video games while hosting it, and often stayed after hours to beat the other staff members' high scores. He still partakes to this day.
Derrick J. Wyatt, character designer for Teen Titans, Scooby-Doo! Mystery Incorporated, and most notably Transformers Animated, has both a personal blog and a Deviant ART account through which he frequently engages in spirited discussion with his fans. He's particularly crazy about Transformers, with Animated having been an absolute dream job for him; he used it as an opportunity to show off his ridiculous knowledge of things like 20-year-old Japanese-exclusive toy characters and stick them into the backgrounds of episodes.
EmilyRose, star of the Syfy series Haven and Elena Fisher in the Uncharted series, has been playing video games since Super Mario Bros. back on the NES, and is a fantastic Halo player. She also plays Uncharted (of course).
Kristian Nairn, most famous for playing Hodor in Game of Thrones, is an avid gamer (he plays World of Warcraft on European AND American servers!), a professional DJ, and a fan of the books on which the TV series was based.
Jon Pertwee was a massive fan of animation. How massive, you ask? He actually, apparently, severely strained his friendship with British comedian (and fellow animation fan) Spike Milligan over whether or not Aladdin was "the greatest movie of all time."
Meet Jim Beaver, of Supernatural. Better known as Bobby Singer. He has reviewed over 1,460 movies on IMDB, wrote a Biography on George Reeves investigating his death, and is present in his forum topics in IMDB. (his name is Jimb-4.)