Mel Brooks then utilized Leachman’s genius to brilliant effect as Frau Blücher in "Young Frankenstein ... with younger comedy writers and actors. Few of them were as funny as Dom DeLuise.

For an example of spot-on comedy casting ... a diabolically funny screenplay by Tina Fey, Waters was faced with the challenge of finding a collection of young, mostly unknown actors who could ...

as funny films often attempt to place notoriously serious actors in comedic roles just for laughs. Here are 25 brilliant times actors played against the type.