Original: His two most financially successful films were released in 1974 : Blazing Saddles ( co-written with Richard Pryor , Andrew Bergman , Norman Steinberg and Alan Uger ) , and Young Frankenstein ( co-written with Gene Wilder ) .
Simplified: Two of his most popular films are Young Frankenstein ( co-written with Gene Wilder ) and Blazing Saddles ( co-written with Richard Pryor ) .