Robert Downey Jr. is an Iron Mustache Man

Robert Downey Jr. and the the stars of their new comedy feature, Tropic Thunder, stop by Total Request Live at MTV’s Times Square Studios on Wednesday afternoon.

Tomorrow is the star-studded conclusion of Jonas Brothers Fan Week on TRL. The JoBros interview the comedic cast of Tropic Thunder and chat with Yung Berg about his new album. OMJ!

Tropic Thunder, which also stars comedic actors Jack Black and Ben Stiller, is out in theaters TODAY!

10+ pictures inside of Iron mustache man Robert Downey Jr.…