As 'Back to the Future' celebrates its 40th anniversary, co-writer Bob Gale has revealed why Michael J. Fox replaced the movie's original star, Eric Stoltz.

After Back to the Future, Wells was a recurring cast member on Off the Rack and Fast Times before taking a break from acting in 1986. However, she would return in 2008 in the film Still Waters Burn.

That’s because “Back to the Future,” the science-fiction classic that hit theaters on July 3, 1985, nearly starred a very different actor than Michael J. Fox. The poor guy even shot scenes.

A pop culture touchstone, “Back to the Future” turned television stars Michael J. Fox and Christopher Lloyd into big screen legends as irrepressible teenager Marty McFly and eccentric mad ...