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
Faith (Buffy the Vampire Slayer) season of "Buffy", but Eliza Dushku declined the offer, and the series was never made. The character later co-stars in the 25-issue comic book "Angel & Faith" beginning in August 2011 under the banner of "Buffy the Vampire Slayer Season Nine", the story taking place mostly in London and the surrounding area. Seven years after the character's creation, Whedon granted her the surname Lehane for a role-playing game and subsequent material. The last issue of "Season Eight" was the first source officially confirmed to be canon that referred to Faith by her full name. Faith is a Slayer: a girl