Alyson Lee Hannigan is an American actress. She is best known for her roles as Willow Rosenberg on the television series Buffy the Vampire Slayer, Lily Aldrin on the sitcom How I Met Your Mother, and Michelle Flaherty in the American Pie film series (1999–2012).
- Born: 24 March 1974 (age 44 years), Washington, D.C., United States
- Height: 1.67 m
- Spouse: Alexis Denisof (m. 2003)
- Children: Satyana Marie Denisof, Keeva Jane Denisof