Alyson Hannigan 1989, her first regular role on a TV series came when she was cast in the short-lived ABC sitcom "Free Spirit". As a teenager, Hannigan babysat for the children of her future "How I Met Your Mother" costar, Bob Saget. In 1997, Hannigan was cast to play Willow Rosenberg, Buffy Summers' best friend, on the television series "Buffy the Vampire Slayer". The show became a success, and Hannigan gained recognition, subsequently appearing in several films aimed at teenaged audiences, including "American Pie" (1999), "Boys and Girls" (2000), "American Pie 2" (2001), and "American Wedding" (2003). She also had a guest
Spike (Buffy the Vampire Slayer) Spike (Buffy the Vampire Slayer) Spike, played by James Marsters, is a fictional character created by Joss Whedon for the television series "Buffy the Vampire Slayer" and "Angel". Spike is a vampire and played various roles on the shows, including villain, anti-hero, trickster and romantic interest. For Marsters, the role as Spike began a career in science fiction television, becoming "the obvious go-to guy for US cult [television]." For creator Whedon, Spike is the "most fully developed" of his characters. The character was intended to be a brief villain, with Whedon originally adamant to not have another major "romantic vampire"