You can watch iron man 2 movie trailer here.
Starring:

Robert Downey, Jr. as Anthony “Tony” Stark or Iron Man
Gwyneth Paltrow as Virginia “Pepper” Potts
Don Cheadle as Lt. Colonel James “Rhodey” Rhodes or War Machine
Sam Rockwell as Justin Hammer
Samuel L. Jackson as Nick Fury
Scarlett Johansson as the antagonist Natasha Romanoff or Black Widow
Mickey Rourke as the antagonist [...]