See then-and-now pictures of the Buffy the Vampire Slayer cast, including Sarah Michelle Gellar, Alyson Hannigan, Nicholas Brendon, and David Boreanaz, are now
Nicholas Brendon: Then
Born in Los Angeles, Nicholas Brendon got his first major role on Buffy as the slayer's best friend Xander Harris. He did not have any powers, but was often regarded as the "heart" of the Scooby Gang. Nicholas appeared in all seven seasons of Buffy, and his twin brother Kelly Donovan also appeared in two episodes of the show -- "The Replacement" and "Intervention."