The upcoming film stars Pedro Pascal as Reed Richards/Mr. Fantastic, Vanessa Kirby as Sue Storm/Invisible Woman, Ebon Moss-Bachrach as Ben Grimm/The Thing and Joseph Quinn as Johnny Storm/Human Torch.

At the core of First Steps are Pedro Pascal, Vanessa Kirby, Joseph Quinn, and Ebon Moss-Bachrach as Reed Richards, Sue and Johnny Storm, and Ben Grimm. Each slips easily into their role like a customized astronaut suit, but special praise has to go to Kirby and Moss-Bacharach for giving the ensemble its real heart.

When Entertainment Weekly asked Fantastic Four: First Steps director Matt Shakman if Downey Jr. filmed that post-credits scene, the filmmaker pleaded the fifth. "For others to talk about," he teased. However, Shakman did reveal that it was the Russo brothers who helmed the post-credits scene since it was shot for Avengers: Doomsday.