20th Century Fox
What about Jeff Bridges playing the Tom Hanks role in the 1988 hit comedy "Big"?
It almost happened.
When director Penny Marshall was thinking about an actor who could capture the childlike innocence of a 12-year-old who, after a wish, is suddenly turned into a 30-year-old, she talked to Bridges.
Columbia Pictures
So eventually, after Bridges didn't quite fit, Hanks got the call.
Bridges can't recall if the decision was amicable between him and Marshall, but what he does know for sure is "Tom just knocked it out of the park."
At the the time "Big" was being made, Hanks was best known for starring in outlandish comedies like "Splash," "Bachelor Party," and "The Money Pit," so Marshall casting him in the "Big" role - which certainly has some dramatic moments - was a bit of a gamble.
But it's really hard to imagine anyone other than Hanks in the "Big" role.