If you like old classic comedic movies, I would suggest :
The Man Who Came to Dinner
Arsenic and Old Lace
Will Success Spoil Rock Hunter?
Abbott and Costello Meet Frankenstein
Buck Privates
The Time of Their Lives (all three are Abbott and Costello movies)
Duck Soup
A Night At the Opera
Horsefeathers (all three are Marx Bros. films)
Both Abbott and Costello and the Marx Brothers have a bunch of other great films besides the ones I've listed.
In case you don't know about it,
http://www.imdb.com/ is a great resource for looking up films and their casts.
As far as I can tell, they have just about every film made listed in their archives.