Laura Prepon is an actress.
Laura Prepon . She is known for her role as Donna Pinciotti in all eight seasons of the Fox sitcom That '70s Show ( 1998 -- 2006 ) , and for her role as Alex Vause in the Netflix original comedy-drama series Orange Is the New Black ( 2013 -- present ) . She made her film debut in 2001 with the independent film Southlander . Her other films include the romantic drama Come Early Morning ( 2006 ) , the comedy Lay the Favorite ( 2012 ) , the thriller The Girl on the Train ( 2016 ) , and The Hero ( 2017 ) .