Mark Ruffalo says 'Avengers: Age of Ultron' will be more ''character-driven'' than the 2012 'Avengers' film.

The 47-year-old actor, who stars as Bruce Banner/The Hulk in the Marvel movies, has offered some insight into the eagerly-awaited new film, revealing how his on-screen character has changed.

Ruffalo shared: ''I think he's definitely matured a little bit since the last one.

''He's become more acclimated to this thing and to being part of the team. I think he feels more a part of them all. But in this particular take on it, it's a much more character-driven version of The Avengers than the first one. It gets a little deeper into each character.''

Ruffalo also spoke about the ongoing struggle in the mind of his on-screen character, telling Empire magazine: ''There's a battle going on between these two opposing egos that live inside him.

''He's definitely worried that the day is going to come when the Hulk gets the best of him, and maybe won't release him, maybe won't give him back. The Hulk knows this too. There's a moment in here where he, begrudgingly, decides to go back to Banner. Who knows where these things will go, but as Bruce is able to impress his will on the Hulk, going into The Hulk and being inside the Hulk when he's raging, The Hulk's will is also growing and able to impress upon Bruce.

''That makes for some wild things. We're laying the groundwork for that here. It'll be interesting to see if that ends up being what would be the next Hulk movie.''