Years ago there was a marathon of films starring the comedy trio of Gene Wilder, Marty Feldman and Madeline Kahn, which included "The Kangaroo Hop" and another movie which was black and white, featuring the three as performers in a carnival or theatre. Marty Feldman's character wore a big punchinello ruff like a jester. That's all I remember.

Len

As far as I can tell the only other movie they have all been in together is The Adventure of Sherlock Holmes' Smarter Brother (1975) (http://www.imdb.com/title/tt0072608/).