The alien character - who is made up of rocks - meets Thor as the god of thunder is imprisoned on the planet Sakaar, just before being made to fight in the gladiator battle against the Incredible Hulk.
Korg has been described as a scene-stealer and in this hilarious clip, whch includes a Rock-paper-scissors joke, it's easy to see why.
Waititi told Entertainment Weekly that he originally wanted Dwayne 'The Rock' Johnson for the role, but resources wouldn't allow it.
Being made of rocks, we really wanted to get someone like The Rock to play him, but there wasn't enough chicken or salmon in Australia to sustain both him and Chris
Korg is a friendly Kronan who, despite being an alien, has a supremely Kiwi accent.
Waititi says he based the character on real-life characters he met in New Zealand.
He's a little special piece of K Rd bouncer outside a nightclub
I just like the idea of a character hard on the outside, and gentle like a marshmallow smudged together with daffodils on the inside... He's like a motherly character; he looks after people, he doesn't like fighting.
Thor: Ragnarok is both a critical and box office hit and is in New Zealand cinemas now.