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
Buffy the Vampire Slayer: The Score Buffy the Vampire Slayer: The Score Buffy the Vampire Slayer: The Score is a soundtrack album featuring incidental music from the "Buffy the Vampire Slayer" TV series. It is the first "Buffy" CD release which is exclusively dedicated to the TV series' musical score, and features compositions from seasons 2, 3, 4, 5 and season 6 from the episode "Bargaining". The album was released on September 9, 2008. Note: The first version of "Sacrifice" appeared on the episode “The Gift”; that version of the song was released on the “Buffy the Vampire Slayer: Once More, With Feeling” soundtrack. On this