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
Darla (Buffy the Vampire Slayer) show many different facets of the role, as not even dying (twice!) could keep Darla from being an important part of the story and mythos behind "Buffy the Vampire Slayer" and the spinoff series "Angel", the latter of which allowed Benz to greatly expand her character." Darla appeared in 25 Buffyverse episodes Darla (Buffy the Vampire Slayer) Darla is a recurring fictional character created by Joss Whedon and played by Julie Benz in the first, second, and fifth seasons of the American supernatural television series "Buffy the Vampire Slayer". The character later appeared in the "Buffy" spin-off series "Angel", making