Claim: Laura Prepon portrayed Donna Pinciotti.

Laura Helene Prepon -LRB- born March 7 , 1980 -RRB- is an American actress , producer , and author . She is known for her role as Donna Pinciotti in all eight seasons of the Fox sitcom That '70s Show -LRB- 1998 -- 2006 -RRB- , and for her role as Alex Vause in the Netflix original comedy-drama series Orange Is the New Black -LRB- 2013 -- present -RRB- . Following That '70s Show , Prepon worked mainly in television . She made her film debut in 2001 with the independent film Southlander . Her other films include the romantic drama Come Early Morning -LRB- 2006 -RRB- , the comedy Lay the Favorite -LRB- 2012 -RRB- , the thriller The Girl on the Train -LRB- 2016 -RRB- , and The Hero -LRB- 2017 -RRB- .