Iron Man 2What did you do yesterday? Oh, it doesn't matter, because my day was probably infinitely better. Not trying to brag or anything, but I was on the set of 'Iron Man 2.' Yep, I win.

The much-anticipated sequel to last summer's Marvel comic blockbuster is even bigger than the first -- right down to the all-star cast. Joining Robert Downey Jr. and Gwyneth Paltrow for the second adventure are Don Cheadle, Mickey Rourke, Sam Rockwell and Scarlett Johansson (who's already getting a lot of fan attention for playing Black Widow).