Princess Diana made the 'Back to the Future' premiere a 'nightmare' for Michael J. Fox

Michael J. Fox wasn’t the only celebrity at the 1985 world premiere of the hit blockbuster film “Back to the Future.” Princess Diana was also at the event and even sat right next to the actor. On Wednesday’s “The Tonight Show Starring Jimmy Fallon,” Fox revealed how she inadvertently turned his big night into a big nightmare.

“The movie started and also I had to go pee,” recalled Fox. “So for the rest of the movie, I'm sitting there, like, dying. I can't say anything to her and I can't walk away from her because I can't turn my back on her. So it was just agony it could have been the greatest night of my life but it was just a nightmare. A pee-holding nightmare.”