Taika Waititi is set to voice Mo Morrison in the upcoming film, who, along with Darby, serves as the movies comic relief. According to Susman, Mo is "uniquely able to challenge Buzz where he most needs to grow. Mo is a feather in the wind, never quite able to commit to any one direction.
The Oscar-winning filmmaker has worked as a writer, director, and actor in a variety of projects. He won an Oscar for writing "Jojo Rabbit" and also wrote on "What We Do in the Shadows," "Flight of the Conchords," and more. He directed all of those projects as well. His acting credits include all of the previously mentioned projects, plus "Our Flag Means Death," "Free Guy," and more.