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
Robin Wood (Buffy the Vampire Slayer) any powers from his mother. He was however trained in the martial arts and various vampire killing tactics by his mother's former Watcher. Robin appeared in 14 canon Buffyverse episodes Robin Wood (Buffy the Vampire Slayer) Robin M. Wood is a recurring character on the television series "Buffy the Vampire Slayer". The character, present for most of Season Seven, is played by D. B. Woodside. Robin is the first (and only) principal of the newly rebuilt Sunnydale High School when Dawn Summers begins her sophomore year. At first, Buffy wonders if he may be evil, but nevertheless accepts a job