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"
The following five celebrity urban legends will likely live on long into the future, despite the fact that none of them is remotely true.
Christian Hartmann, Mario Anzuoni/Reuters
Everybody comes from somewhere, and that includes celebrities. Some even wandered the same high school hallways together back in their hometowns. Take a look at some stars who were high school classmates.