Scarlett Johansson and Mark Ruffalo talk about how Natasha and Bruce work well together in Marvel's "Avengers: Age of Ultron". (Video: Marvel Entertainment)
Cobie Smulders and Jeremy Renner discuss how the roles of Maria Hill and Clint Barton have changed in the film Marvel's "Avengers: Age of Ultron". (Video: Marvel Entertainment)
Aaron Taylor-Johnson and Elizabeth Olsen talk about joining Earth's Mightiest Heroes as Quicksilver and Scarlet Witch with Marvel's "Avengers: Age of Ultron". (Video: Marvel Entertainment)
