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 Cla
Did you know that Alyson Hannigan initially hesitated to audition for "How I Met Your Mother" because she was wary of committing to another long-running network series after "Buffy the Vampire Slayer"?
Alyson Hannigan achieved rare dual success with two beloved, long-running television series: "Buffy the Vampire Slayer" and "How I Met Your Mother." Her portrayal of Willow Rosenberg became a groundbreaking character for LGBTQ+ representation, while Lily Aldrin earned her a People's Choice Award and cemented her status as a sitcom icon.
Hannigan's lasting impact lies in her ability to imbue complex, relatable characters with humor and heart, making her a cherished figure in television history and a cornerstone of millennial pop culture.
Also known as: A. Hannigan, Aly Hannigan