Mr.  Serious is taking up a cameo spot on a funny movie with a load of sexy men, funny guys Ben Stiller and Jack Black.  As well, Nick Nolte, Matthew McConaughey , and Robert Downey Jr.

The movie, "Tropic Thunder" is being filmed in LA and will be in theaters in July. 

Will be interesting to see Tom not take himself seriously for once, or will he be able to resist?