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
The Body (Buffy the Vampire Slayer) The Body (Buffy the Vampire Slayer) "The Body" is the sixteenth episode of the fifth season of the supernatural drama television series "Buffy the Vampire Slayer". The episode was written and directed by series creator Joss Whedon and originally aired on the WB network in the United States on February 27, 2001. In the series, Buffy Summers is a teenager chosen by mystical forces and endowed with superhuman powers to defeat vampires, demons, and other evils in the fictional town of Sunnydale. She is supported in her struggles by a close circle of friends and family, nicknamed the Scooby Gang.