With a very popular trailer already out, Marvel fans probably thought they already knew everything there was to know about the cast of Thor: Ragnarok. Cate Blanchett is a goth; Tessa Thompson is a bad-ass warrior; Jeff Goldblum is, well, Goldblum. But it turns out that the film also features a pair of characters that Marvel has been carefully keeping under wraps—until now.

Marvel invited a small group of journalists into its newly renovated offices on the Disney Studios lot Monday night to unveil footage, art, and secrets behind the studio’s packed upcoming slate. Thor director Taika Waititi was on hand to reveal one of the new characters in Ragnorak, played by . . . Taika Waititi.

His name is Korg, “like the piano,” Waititi announced, before showing off some concept art and rough footage. Korg is a Kronan, a.k.a. a hulking rock beast from the comics—think a gladiator version of the Rockbiter from The Neverending Story, or a more nimble The Thing. Waititi jokingly said that because the creature was made of rocks and needed to be effortlessly charismatic, warm, and funny, he wanted to cast Dwayne “The Rock” Johnson in the role. But because “there wasn’t enough chicken and salmon in New Zealand” to sustain the muscles of both The Rock and Chris Hemsworth, Waititi said, he instead cast himself in the mo-cap part.

This is excellent news for fans of both Waititi and the universally well-received tone of the Thor: Ragnarok trailer. When Hemsworth dropped that “he’s a friend from work” line in the trailer, Waititi aficionados immediately recognized the writer/director/actor’s trademark wit. (He’s also the reason why those recent Thor roommate videos are so hilarious.) That wit can easily be seen on display in Waititi’s work on Flight of the Conchords, What We Do in the Shadows, Hunt for the Wilderpeople, Boy, and more. Waititi almost always appears in his own films and, just as he did in Hunt for the Wilderpeople, the New Zealand-born director will be laying on a lilting Māori accent for Ragnarok.

The reason Thor fans haven’t seen Korg yet is that he’s still a work in progress, design-wise. The character technically made his debut in Thor: The Dark World, where the Asgardian destroyed him with one quick uppercut.