| First Name | Alyson |
| Middle Name | Lee |
| Last Name | Denisof |
| Maiden Name | Hannigan |
| Full Name at Birth | Alyson Lee Hannigan |
| Other Names | Alyson Lee (Hannigan) DenisofAlyson Lee HanniganAllycat |
| Age | 37 |
| Date of Birth | March 24, 1974 |
| Birthplace | Washington, DC |
| Height | 5' 5" (165 cm) |
| Build | Slim |
| Eye Color | Green |
| Hair Color | Brown - Light |
| Star Sign | Aries |
| Religion | Jewish |
| Ethnicity | White |
| Nationality | American |
| High School | North Hollywood High School, North Hollywood, CA (1992) |
| University | California State University (occasional classes, no degree) |
| Occupation | Actress |
| Occupation Category | Actress |
| Claim to Fame | Willow on Buffy the Vampire Slayer |
Alyson Lee Hannigan (born March 24, 1974) is an American actress. She is known for her roles as Willow Rosenberg on the cult classic television series Buffy the Vampire Slayer, Michelle Flaherty in three American Pie films, and Lily Aldrin on the CBS sitcom How I Met Your Mother.
Selected Alyson Hannigan film and TV show credits: