Laura Prepon is an American actress, best known for her role as Donna Pinciotti in the long-running television series That '70s Show. She is also known for the role of Hannah Daniels on the ABC drama October Road.Prepon was a cast member of the ABC show October Road, which debuted March 15, 2007. The show was canceled by ABC on May 12, 2008, despite strong ratings and a grassroots campaign from the show's fanbase to keep the show alive. In April 2007, she starred in a short film, Once Upon a Time. She has also appeared in the Oxygen movie, Romancing the Bride. She also was the original voice for Hayley Smith on American Dad! and voiced her in an Unaired Pilot.In 2009, she appeared on How I Met Your Mother as Karen, Ted's old high school and college girlfriend on the episodes "Sorry Bro" and "The Front Porch."
She appeared as Lauren, Mary's long lost sister, on USA network's In Plain Sight in the episode "A Frond In Need."
