What Abbott and Costello movie features the who's on first routine?!

Question: 1st one who gets it right gets 10 points.

Answers: 1st one who gets it right gets 10 points.

They did it first onstage; later on they used it in two movies:
One Night in the Tropics and especially in The Naughty Nineties

One Night in the Tropics. It was also done in The Naughty Nineties.

Great routine.

First answerer seems to know his stuff.
I always thought it was "Buck Privates"

The most complete version of Bud and Lou's famous routine is performed in "The Naughty Nineties", a 1945 release set on an old-time showboat.

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