A classic I was embarrassed to admit I hadn't seen yet, but knew I had to. 

If you also haven't seen Casablanca, you're missing out on a slice of American culture. You see, this movie is Titanic epic, one that revolves around two lovers at a time of political chaos, and that is tragic as much as it is classic love. 

But amorous as Bergman and Bogart seemed on camera, the two were happily indifferent to one another on set. Could it possibly be that their lack of rehearsals prior to filming affected their camaraderie? Or perhaps it was the fact that neither were ecstatic about their roles in Casablanca? Also they didn't see eye to eye LITERALLY. Seems Bergman's 5'9" height caused Bogart to stand on blocks when he was in a scene with her. 

Either way, both were notorious for their marital infidelity-- Bergman with her leading men usually, and Bogart with non- co-stars minus Lauren Bacall-- but somehow never crossed that line with each other. 

At the very least, let's hope these two found Casablanca to the beginning of a beautiful friendship together.