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 (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).
Buffy the Vampire Slayer earned international attention for Hannigan’s character Willow and her relationship with Tara Maclay played by Amber Benson. Willow and Tara’s relationship became the first long-term lesbian relationship on U.S. television.
