Capote
I was unfamiliar with this movie until I saw Capote with Philip Seymour Hoffman. There's a scene where he's talking about making a movie w/Houston & Bogart & how much they all drank (he doesn't mention the name of the movie) & I had NO idea which one he was talking about. So did a little cross-referencing on imdb & discovered Beat the Devil! Just finished seeing it & thoroughly enjoyed it. Having seen Key Largo & Maltese Falcon quite recently I appreciated the parody in BTD all the more. Will definitely see it again sometime in the future.
Also found out that Capote co-wrote one of my all time favorite movies: The Innocents w/Deborah Kerr.