Alyson Lee Hannigan is an American actress. She is best known for her roles as Willow Rosenberg in the television series Buffy the Vampire Slayer, Lily Aldrin on the CBS sitcom How I Met Your Mother and Michelle Flaherty in the American Pie film series.
- Born: March 24, 1974 (age 43), Washington, D.C.
- Spouse: Alexis Denisof (2003-10-11 to present - Marriage)
- Aliases: Allison Hannigan, Allison Lee Hannigan, Allycat, Alyson Denisof, Alyson Lee Hannigan
- Children: Keeva Jane Denisof, Satyana Marie Denisof
- Height: 5′ 5″ (1.65m)