No Marvel movie has ever tried to fit this many people into one frame. Empire pegs the Avengers Doomsday cast at roughly 180 performers, and even the officially confirmed names read like a decade of the MCU crammed into a single war room. So who is actually in this thing, who is only a rumour, and who could still crash the party during reshoots? Here is the definitive breakdown.
We built this Avengers Doomsday cast guide to be the one link you need: the confirmed roster, the strong rumours, and our honest verdict on each. It updates as Marvel confirms more, and right now the list is moving fast.
Who is officially in the Avengers Doomsday cast?
Start with the anchor. Robert Downey Jr. is back, not as Tony Stark, but as the villain Doctor Doom, and the entire film is built around his face. Around him, Marvel has assembled a coalition that spans the Avengers, the Fantastic Four, the Thunderbolts, the Wakandans, and the returning Fox X-Men. Here is the confirmed lineup as it stands.
| Character | Actor |
|---|---|
| Doctor Doom | Robert Downey Jr. |
| Thor | Chris Hemsworth |
| Captain America (Sam Wilson) | Anthony Mackie |
| Bucky Barnes | Sebastian Stan |
| Loki | Tom Hiddleston |
| Ant-Man | Paul Rudd |
| Yelena Belova | Florence Pugh |
| Red Guardian | David Harbour |
| US Agent | Wyatt Russell |
| Ghost | Hannah John-Kamen |
| Sentry | Lewis Pullman |
| Mister Fantastic | Pedro Pascal |
| Invisible Woman | Vanessa Kirby |
| The Thing | Ebon Moss-Bachrach |
| Human Torch | Joseph Quinn |
| Magneto | Ian McKellen |
| Professor X | Patrick Stewart |
| Cyclops | James Marsden |
| Beast | Kelsey Grammer |
| Nightcrawler | Alan Cumming |
| Mystique | Rebecca Romijn |
| Gambit | Channing Tatum |
| Deadpool | Ryan Reynolds |
| Shang-Chi | Simu Liu |
| Black Panther (Shuri) | Letitia Wright |
| M’Baku | Winston Duke |
| Namor | Tenoch Huerta |
| Falcon | Danny Ramirez |
| Chris Evans (role guarded) | Chris Evans |
That is already one of the deepest benches in blockbuster history, and Marvel has kept Chris Evans’s exact role under wraps, fuelling the endless Steve Rogers versus Johnny Storm debate. For the mutant side of the equation specifically, we go deeper in our breakdown of the confirmed X-Men roster.
Which Avengers Doomsday cameos are still just rumours?
This is where it gets spicy. Doomsday is reportedly still shooting, and scoopers claim the Russo Brothers are using reshoots to smuggle in cameos that were never on any press release. Treat this whole section as unconfirmed, but the pattern is loud.
- Hawkeye (Jeremy Renner): Renner just posted his old costume to Instagram despite denying involvement in 2025. Read our full take on the MCU cast tracker.
- Hulk (Mark Ruffalo): Reportedly stepped away from another project to shoot a Marvel role during the reshoot window.
- Scarlet Witch (Elizabeth Olsen): A Wanda stunt double has reportedly been spotted on set, which would be a huge deal given where WandaVision and Multiverse of Madness left her.
- Spider-Man (Tom Holland): Widely expected to appear given Brand New Day’s connective tissue, though his exact size of role is unclear.
- More Fox-era and legacy faces: Scoopers keep name-dropping additional mutants and Infinity Saga veterans as the reshoots continue.
Our honest verdict: the confirmed 29-plus names are locked, but the rumoured cameos are exactly the kind of thing Marvel loves to deny until the theatre lights go down. We score each of these claims in our scored Marvel rumour tracker.
Why is the Avengers Doomsday cast this enormous?
Because this is the payoff movie. Doomsday is the collision point for the Avengers, the Fantastic Four, and the X-Men before everything funnels into Secret Wars, and the Russo Brothers clearly want the multiverse to feel genuinely crowded. A villain wearing Tony Stark’s face demands a response from everyone who ever wore a cape.
The risk, of course, is that 180 performers is a lot of soup for one movie to serve. The smart money says most of these are extended cameos and battlefield appearances rather than full arcs, with the emotional weight carried by a smaller core. For what the plot may actually do with all of them, see our roundup of the Doomsday plot leaks.
How this sets up Secret Wars
Every face Doomsday introduces is a piece the Russos get to move again in Avengers: Secret Wars in 2027. That is why the cameo hunt matters so much: this is not just one movie’s cast, it is the opening board state for the entire finale of the Multiverse Saga. For the big picture on both films, bookmark our complete Avengers: Doomsday guide.
What happens next
With reshoots ongoing, expect the Avengers Doomsday cast list to keep growing right up to release on December 18. Every surprise Marvel can protect now is a bigger gasp in the cinema later. We will update this guide the moment anything new is confirmed.
Which rumoured cameo do you most want to see actually happen, and which returning hero are you convinced will steal the whole movie? Tell us your dream Doomsday lineup in the comments.
Sources: Wikipedia, SuperHeroHype (via Empire), Deadline. Image: Marvel Studios.
