Alyson Lee Hannigan (born March 24, 1974)[1] is an American actress and television presenter. She is best known for her roles as Willow Rosenberg on the television series Buffy the Vampire Slayer (1997–2003), Lily Aldrin on the sitcom How I Met Your Mother (2005–2014) for which she won a People's Choice Award in 2009, and Michelle Flaherty in the American Pie film series (1999–2012).
