The Fat Man (1951) – J. Scott Smart . . . don’t you love his name?! . . . plays Brad Runyon in Dashiell Hammett’s companion character to his Thin Man character.  The movie may be little known but several of the actors might be:  a very young Rock Hudson, Julie London, Jayne Meadows (Mrs. Steve Allen), and . . . believe it or not . . . Emmett Kelly, the circus clown.  This copy isn’t the greatest but . . . fat or not, this man is worth watching, especially when he's dancing with Julie London about 25 minutes into the movie!:

http://www.archive.org/details/TheFatMan1951