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: Radio Sunnydale – Music from the TV Series one for the USA and one for the UK. The US version featured only twelve tracks, while the UK version removed the tracks by Joey Ramone, Sarah McLachlan and Blur but added twelve more, making a total of 21 tracks. The artwork for the two versions is also completely different, with the UK's being much brighter. The Australia and Latin America releases are identical to the UK version. The soundtrack is now out of print in both the US and the UK. Buffy the Vampire Slayer: Radio Sunnydale – Music from the TV Series Buffy the Vampire Slayer: Radio Sunnydale