okay so a few months ago i watched this classical black and white romantic movie on tcm, and i cant remember anything about it other than what its about.

so here's all i can recall:
-its about a man who writes plays
-his wife acted on stage
-she divorced him because he spent too much time on his job
-there's something about the man always wanting girls who weigh exactly 115 pound when he makes them audition for his play
-they rum out of gas and stay in some motel and there's something about that that's really important
-in the end they end up falling back in love and act out stuff in front of the lawyers so they wont get an official divorce

ugh i really need the name of it because i fell in love with it, and i want to buy it, in order to do that i need a name.