|Birthday||March 7, 1980|
|Birth Place||Watchung, New Jersey, USA|
Best known for her role as Donna Pinciotti in the long-running Fox situation comedy That '70s Show, for all eight seasons.
She is also known for the role of Hannah Daniels on the ABC drama October Road. She has voiced characters in animated TV series such as American Dad! and King of the Hill, as well as a character in the video game Halo 2.
Prepon was born in Watchung, New Jersey,the daughter of Marjorie, a high school teacher, and Michael, an orthopedic surgeon, who died during heart surgery in 1993.Prepon is the youngest of five children.
She attended Watchung Hills Regional High School. She studied at Caroline Thomas' Total Theater Lab in New York City. Her father was of Russian Jewish descent and her mother is of Irish Catholic background.
In a December 2007 interview in Women's Health, Prepon stated that she was a Scientologist.