As "The Hangover III" hits theaters, where we're likely to see another Mike Tyson cameo, take a look at some other celebrities who have made memorable cameos on the big screen.
Mike Tyson – "The Hangover"
J.K. Nakata/United States Geological Survey
Akron Public Schools/CNN
Joacim Osterstam/Wikimedia Commons
iStock / Funwithfood
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