Alyson Lee Hannigan (born March 24, 1974) is an American actress. She currently plays Lily Aldrin in the CBS sitcom How I Met Your Mother, but is best known for her previous role as Willow Rosenberg on the television series Buffy the Vampire Slayer. She also played flautist Michelle Flaherty in the American Pie film series.
Alyson, born in Washington DC, began her acting career in Atlanta at the young age of 4 in commercials sponsoring such companies as McDonald's, Six Flags, and Oreos. She is a seasoned television actress veteran, guest starring in "Picket Fences" (1992), "Roseanne" (1988), "Touched by an Angel" (1994) and the "Torkelsons, The" (1991) before starring in her most notorious role yet in "Buffy the Vampire Slayer" (1997) as Willow Rosenberg. Now she stars in the brand new comedy "How I Met Your Mother", a hit-show, from CBS.
