Mark Ruffalo has revealed that his role as Hulk will be "even bigger" in the Avengers sequel.
The actor was introduced as Bruce Banner and the Hulk in the 2012 movie, and will reprise the part in the upcoming Avengers: Age Of Ultron.
He told Total Film: "[My role's] even bigger than last time, and it's more complex and it has more layers and a bit more arc."
Mark also said he was enjoying the motion-capture process.
"I'm really tripping on the technology of this motion-capture stuff... now I just completely embrace it and see it as this other exciting place we can go as performers," said the 46-year-old.
It was previously revealed that Mark's Hulk and Jeremy Renner's Hawkeye would have the spotlight on them in the new film.
Marvel Studios boss Kevin Feige told website Joblo.com that the characters would have "very big parts".
Principal photography is already under way on Avengers: Age Of Ultron, which will be directed by Joss Whedon and will also star Robert Downey Jr, Chris Evans, Scarlett Johansson, Aaron Taylor-Johnson, Samuel L Jackson, Elizabeth Olsen and James Spader.
It is scheduled for release in May 2015.