Halloween saw an unexpected Marvel crossover as Robert Downey Jr. and Pedro Pascal traded iconic comic book personas. Downey Jr. shared a video of the pair dressed as Mister Fantastic and Doctor Doom, respectively. In the surprise costume swap, Pascal donned the signature metal mask of Doctor Doom, while Downey Jr. sported the retro blue costume of Reed Richards.
While Downey Jr.'s costume appeared to be more elaborate, featuring the Fantastic Four's classic aesthetic, Pascal opted for a more casual interpretation of Doom's look with jeans and a sweatshirt. The playful exchange highlights the actors' engagement with their roles ahead of the upcoming film.
Beyond the social media buzz, Downey Jr. and Pascal also took their costumes out to greet trick-or-treaters. Pascal shared footage on his Instagram story of them interacting with fans. One notable encounter, documented by X/Twitter user Patrick Oneill, featured the actors meeting children dressed as characters from Star Wars, including Pascal's own Mandalorian. During this interaction, Downey Jr. reportedly joked about them meeting the "real" Mandalorian.
The movie that prompted this festive spirit, Avengers: Doomsday, is scheduled for release on December 18, 2026. It is set to feature a cameo from Sandra Hüller and marks the final on-screen appearance of Sir Patrick Stewart. Recent promotional material has also spotlighted Doctor Doom and his Latverian witches.