Profile photo of Alyson Hannigan

Alyson Hannigan

Alyson Lee Hannigan (born March 24, 1974) is an American actress and television presenter. She is best known for her roles as Willow Rosenberg in the television series Buffy the Vampire Slayer (1997–2003), as Lily Aldrin in the sitcom How I Met Your Mother (2005–2014) for which she won a People's Choice Award in 2009, and as Michelle Flaherty in the American Pie film series (1999–2012). Since 2016, Hannigan has hosted the television show Penn & Teller: Fool Us. She also provides the voice of Claire Clancy in the Disney Junior animated series Fancy Nancy (2018–present).

Filmography

2026
Solo Mio

as Meghan

Movie
2003
American Wedding

as Michelle Flaherty

Movie
2001
American Pie 2

as Michelle Flaherty

Movie
1999
American Pie

as Michelle Flaherty

Movie
2005
How I Met Your Mother

as Lily Aldrin

TV Show
1997
Buffy the Vampire Slayer

as Willow Rosenberg

TV Show