He had originally been asked to write music for the film but after film producer Clark Spencer spotted his likeness for one of the characters, he was offered a cameo.
"We went to him first and said, 'Hey, we have this party scene in the world of Fix It Felix Jr, and we have a DJ and we think it would make a nice cameo if we put you into it.' And he was ecstatic," he said.
Core wonders just how long it's going to be before we see Skrillex dressed up in a pair of tights as the next Batman. Or is it Robin - we'll let you be the judge of that one.