Robert Downey Jr. a small appearance as Iron Man's alter ego Tony Stark in the 2008 film "The Incredible Hulk", as a part of Marvel Studios' depicting the same Marvel Universe on film by providing continuity among the movies. After "Iron Man", Downey appeared alongside Ben Stiller and Jack Black in the Stiller-directed "Tropic Thunder". The three actors play a Hollywood archetype—with Downey playing self-absorbed multi-Oscar-winning Australian method actor Kirk Lazarus—as they star in an extremely expensive Vietnam-era film called "Tropic Thunder". Lazarus undergoes a "controversial skin pigmentation procedure" in order to take on the role of African-American platoon sergeant Lincoln Osiris, which
Iron Man (2008 film) the star, the superhero is the star. The success of "X-Men" and "Spider-Man" without being star-driven pieces reassures [executives] that the film does have an upside commercially." However, in September 2006, Robert Downey, Jr. was cast in the role. Favreau chose Downey, a fan of the comic, because he felt the actor's past made him an appropriate choice for the part, explaining "The best and worst moments of Robert's life have been in the public eye. He had to find an inner balance to overcome obstacles that went far beyond his career. That's Tony Stark." Favreau faced opposition from Marvel