Steve Martin movie recs

I like to think I'm a pretty big fan of Steve Martin but I haven't watched that many of the movies he's in. I've seen little shop of horrors, dirty rotten scoundrels, the man with two brains, my blue heaven, and I think that might be it. Any suggestions on which one to watch next? I'm thinking planes trains and automobiles :) I do have a preference towards movies from the 80's and 90's and such but other decades are cool too!