Robert Downey, Jr., also known as Iron Man, gave news-hungry Comic-Con fans exactly what they wanted during his appearance at the convention: he announced the next Hulk.

Mark Ruffalo, primarily known for roles in the romantic comedy and dramatic film genres, will officially step into The Hulk’s sizable shoes to take on the role of self-effacing scientist Bruce Banner, the green hero’s alter ego. (Edward Norton, who played the green superhero in the 2008 film, was dropped from the upcoming Avengers movie project, leaving a huge casting hole in the Marvel movie franchise.)

Meanwhile, Jeremy Renner (The Hurt Locker) has been confirmed for the role of Hawkeye.

The Avengers is scheduled for release in 2012. Comic book fans won’t have to wait that long to see more live-action heroes, however: Captain America and Thor are both getting their own movies, which will release in the summer of 2011.