Alyson Hannigan

Alyson Lee Hannigan (born March 24, 1974) is an American actress. 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), and Michelle Flaherty in the American Pie film series (1999–2012).\n', ' Hannigan was born in Washington, D.C., the only child of Emilie (Posner) Haas, a real estate agent, and Alan Hannigan, a Teamsters trucker. Her father is of Irish ancestry and her mother is Jewish.\n', ' At age four, Hannigan began appearing in commercials. She moved to Hollywood at age 11. \n', '