Michael J. Fox might have snagged the role of Marty McFly, but as movie legend has it, plenty of others had their hat in the ring.
Pulp Fiction star Eric Stoltz even began filming on Back To The Future for a few weeks before producers had second thoughts and replaced him with Fox.
Read more: Back To The Future III at 30
But before that the likes of Ben Stiller and Pretty In Pink's Jon Cryer auditioned for the role.
And on the occasion of the movie's 35th anniversary, Stiller has said that the least said about his audition the better.
But Cryer, on the other hand, has revealed some fabulous trivia about how different the movie he auditioned for was from the movie that we now know and love.
In a brilliant Twitter thread, he explains that there was originally no DeLorean - rather the vessel for transporting Marty back to the 1950s was just a regular time machine.
And while some BTTF buffs will already know this, Cryer also drops in that in the early version of the script, it's a bottle of Coca Cola and a lead-lined fridge which saves the day for Marty.
Cryer's thread details the whole thing...
The fridge twist, of course, was used in Indiana Jones and the Kingdom of the Crystal Skull, with Harrison Ford’s Indy sheltered from an atomic blast in a handy nearby fridge.
And with Steven Spielberg's Amblin Entertainment being the makers of Back To The Future, perhaps it's not surprising that the plot point turned up in a later film.
Mr Cryer, we salute you.