Alison Ann Sweeney (born September 19, 1976) is an American soap opera actress. She was born in Los Angeles, California.

Sweeney is best known for her portrayal of Samantha "Sami" Gene Brady on the American soap opera Days of Our Lives. In this role, she has earned four Soap Opera Digest Awards and a Fan Voted Daytime Emmy Award. She has been on Days since January 6, 1993. A teenage actress on the soap, she took fellow Days star Bryan Dattilo to her high school prom.

Her television debut was at age 5 in a Kodak advertisement.

In the 1990s, Sweeney struggled with her weight. She eventually was a dress size 12, not obese by medical standards, but still quite larger than her television peers. She documented all the tabloid talk and personal anguish in her 2004 memoir, All The Days of My Life (So Far).

In 2002, she appeared on a celebrity episode of the NBC reality game show Fear Factor. Her appearance was notable for her panic at being in a "coffin" with lar