Laura Prepon (born March 7, 1980) is an American actress, known for her role as Donna Pinciotti in all eight seasons of the Fox sitcom That '70s Show. She is also known for the role of Hannah Daniels on the ABC drama October Road and her role as Alex Vause in the Netflix original series Orange Is the New Black. 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.