Robert Downey Jr. Shares a Behind-the-Scenes SDCC Video With the 'Avengers: Doomsday' Cast
The actor was part of the cast alongside several of the film’s stars.
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Robert Downey Jr. shared a video on his social media showing himself backstage at SDCC 2026 alongside cast members from Avengers: Doomsday for the Marvel Studios panel held at the event. Check it out below:
Robert Downey Jr. compartilha video dos bastidores da #SCC ao lado do elenco de 'AVENGERS: DOOMSDAY', e fazendo aquele marketing também. pic.twitter.com/E13VFbAR7L
— Taverna Marvel (@TavernaMarvel) August 7, 2026
In the video, RDJ appears alongside names like Anthony Mackie, Simu Liu, Kelsey Grammer, Pedro Pascal and more.
Everything you need to know about Avengers: Doomsday
The villain of the story in the fifth Avengers movie will be Doctor Doom, played by Robert Downey Jr., the actor who portrayed the legendary Iron Man in the MCU's Infinity Saga and now takes on the role of antagonist. Avengers: Doomsday will be directed by brothers Anthony and Joe Russo (Endgame), with a script by Michael Waldron (Loki) and Stephen McFreely (Endgame).
Marvel has already confirmed the main cast members of the new movie, in one of the biggest MCU star gatherings ever assembled. Returning from previous Avengers movies are: Chris Evans as Steve Rogers, Chris Hemsworth as Thor, Anthony Mackie as Captain America, Sebastian Stan as the Winter Soldier, Paul Rudd as Ant-Man, Winston Duke as M'Baku, and Letitia Wright as Shuri/Black Panther.
From characters introduced after Avengers: Endgame — in Phases 4 and 5 of the MCU — we have Simu Liu as Shang-Chi, Danny Ramirez as Falcon, the entire new Fantastic Four (Pedro Pascal as Mister Fantastic, Vanessa Kirby as the Invisible Woman, Joseph Quinn as the Human Torch, and Ebon Moss-Bachrach as the Thing), almost the entire cast of Thunderbolts* (Florence Pugh as Yelena, Wyatt Russell as U.S. Agent, David Harbour as Red Guardian, Hanah John-Kamen as Ghost, and Lewis Pullman as Bob, the Sentry), and Tenoch Huerta as Namor.
In a livestream announcing the cast, there was also the movie's biggest surprise so far: the return of the classic X-Men from the old Fox films, including Patrick Stewart as Professor X, Ian McKellen as Magneto, James Marsden as Cyclops, Alan Cumming as Nightcrawler, Kelsey Grammer as Beast, Rebecca Romijn as Mystique, and, introduced in Deadpool & Wolverine, Channing Tatum as Gambit.
Avengers: Doomsday opens on December 18, 2026.
