Question: Who was originally cast for back to the future?
qaPairs: question: Who was originally cast as Marty McFly for Back to the Future?
answer: Eric Stoltz
question: Who was originally cast as Biff Tannen for Back to the Future?
answer: J.J. Cohen
question: Who was originally cast as Marty's girlfriend Jennifer for Back to the Future?
answer: Melora Hardin