Video: Mark Ruffalo on Playing The Hulk in The Avengers

In the below video, the franchise newcomer talks about the dual roles of Banner and his gamma-fueled alter ego and reuniting with his Zodiac co-star, Robert Downey Jr.

If you missed our previous features, click here to watch Samuel L. Jackson (Nick Fury), Clark Gregg (Agent Coulson) and Cobie Smulders (Maria Hill), here for Tom Hiddleston (Loki) and here for Scarlett Johansson (Black Widow) and Jeremy Renner (Hawkeye). Then check back tomorrow Chris Hemsworth (Thor) and writer/director Joss Whedon.