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
Angel (Buffy the Vampire Slayer) de Lioncourt and Spike. "Forbes" named Angel The Series as the Hollywood's second most powerful vampire show. Rankings were based on television ratings, inflation-adjusted box office performance, as well as presence in popular culture through blog and press mentions since 1979. Angel (Buffy the Vampire Slayer) Angel is a fictional character created by Joss Whedon and David Greenwalt for the American television programs "Buffy the Vampire Slayer" and its spin-off series "Angel". The character is portrayed by actor David Boreanaz. As introduced in "Buffy" in 1997, Angel is a love interest for heroine Buffy Summers (Sarah Michelle Gellar), a young