Lou Ferrigno, who dubbed over the grunts and growls for The Incredible Hulk in Marvel's The Avengers, will return in 2015's Avengers: Age of Ultron, reports Nuke the Fridge (via CBM). NTF reports that Ferrigno told them as much personally at WonderCon in Anaheim this weekend. They have no direct quote, just a confirmation. The bodybuilder and actor, best known for playing the first live-action iteration of the Marvel monster/superhero in TV's The Incredible Hulk in the late '70s and early '80s, did not voice the Hulk's one spoken line in The Avengers -- that was done by Mark Ruffalo, who played Bruce Banner, the Hulk's alter ego. Prior to The Avengers, Ferrigno voiced The Hulk in Hulk, The Incredible Hulk and the 1990s The Incredible Hulk animated series. He currently voices Billy on Adventure Time.