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 2011, "Buffy the Vampire Slayer Season Ten" in 2014, "Buffy the Vampire Slayer Season Eleven" in 2016, and "Buffy the Vampire Slayer Season Twelve" in 2018, which was the final season of the comic book series. Joss Whedon was interested in a film continuation in 1998, but such a film has yet to materialize. In July 2018, 20th Century Fox Television began development on a television reboot of the series. Monica Owusu-Breen is to serve as showrunner and has been working on the script with Whedon, who is to be an executive producer. News of Whedon's involvement is being seen