Many prolific actors have played Marvel’s Jade Giant since the character began appearing on film. Eric Bana and Edward Norton both starred as the Hulk in his two solo films, and the role has since been portrayed by Mark Ruffalo since 2012’s The Avengers.
Waititi said that he played the Hulk in some scenes in the third Thor movie when Ruffalo wasn't available. The director revealed his participation in the motion capture performances while discussing his various roles with Collider.
“I’m playing one of the 'Planet Hulk' characters: Korg, who’s a Kronan and a bit bigger than me. It’s all mo-cap,” Waititi said. “And often, since Mark's no longer here, I’ll often jump in for Hulk’s stuff. We have stand-ins, but they’re not actors and they don’t have timing so I’ll jump in for those things.”
We learned before that Waititi’s main role in the film would be Korg, one of Hulk’s Warbound from the "Planet Hulk" comic books. But this is the first time we learned that he also performed mo-cap work for the Hulk himself.
Waititi tends to stick himself in all of his films that he directs, going back to his first film Eagle vs Shark all the way to his latest film Hunt for the Wilderpeople. Though the significance of the roles vary from film to film, Thor: Ragnarok is the only movie where he’s portraying multiple characters.
The director previously revealed to ComicBook.com that he would be playing Surtur with Clancy Brown voicing the character.
“I’m in all my films,” Waititi said. “I can’t help it. I’ll just jam myself in there if there’s a space.”
Given the prominence of motion capture performance in Marvel Studios films and Waititi’s reasoning for standing in for Ruffalo, it makes sense. We’ll see if he gets the credit he deserves when Thor: Ragnarok premieres in theaters on November 3.