About
Alyson Hannigan is an American actress and television presenter, best known for her roles in popular television series and films. She started her film career with supporting roles in comedies and gained wider recognition for her role in the American Pie film series as Michelle Flaherty. Hannigan is also well-known for her portrayal of Willow Rosenberg in the television series Buffy the Vampire Slayer and as Lily Aldrin in How I Met Your Mother, both of which solidified her status as a prominent comedic actress.
Career Timeline
Early Roles
Hannigan began her acting career with minor roles in television series and commercials.
'Buffy' Breakthrough
Her role as Willow Rosenberg in 'Buffy the Vampire Slayer' brought her widespread recognition and popularity.
'American Pie' Success
Her role in 'American Pie' further solidified her comedic talents and expanded her fanbase.
'How I Met Your Mother'
Her portrayal of Lily Aldrin in 'How I Met Your Mother' cemented her status as a leading comedic actress.
Hosting Ventures
Ventured into TV hosting, increasing her visibility and versatility.
Continued TV Work
Hannigan continues to appear in TV roles, leveraging her established fanbase and comedic talent.
Established Comedic Actress
Hannigan remains a well-known and respected comedic actress, with a steady stream of work in television.
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Last updated: February 24, 2026