Anthony Head is a British actor best known as his role as Giles in Buffy the Vampire Slayer when he went by his full name, Anthony Stewart Head, and more recently as King Uther in Merlin. He also had a short role as Will's terrible dad in The Inbetweeners Movie.
He also has an album, played Nathan in the Rock Opera Repo! The Genetic Opera and served up glorious sides of ham as the evil guardian Mr Gently Benevolent in Radio 4's Bleak Expectations. He also played Michael the Prime Minister in sketch show Little Britain, and appeared in the Doctor Who episode "School Reunion" as that episode's villain, Mr. Lucas Finch.
Long before he was Giles, he was most recognisable for being half of an insufferably smug Will They or Won't They? couple flirting over instant coffee in commercials for Nescafé.
Oh, and had played Dr. Frank-N-Furter in some stage versions of Rocky Horror Picture Show (referred to as The Rocky Horror Show when done on stage).