Avengers: Doomsday is one of the most anticipated superhero films of 2026. Marvel Studios brings together Avengers, X-Men, Fantastic Four and Thunderbolts characters for one massive crossover. Robert Downey Jr. returns to the MCU as the main villain, Doctor Doom. The film releases in theaters on December 18, 2026.

The film features a huge ensemble. Chris Hemsworth returns as Thor. Tom Hiddleston returns as Loki. Sebastian Stan returns as Bucky Barnes. Ian McKellen and Patrick Stewart bring back the original X-Men roles. Here is the full look at the Avengers: Doomsday cast, their characters and the release date.

Avengers: Doomsday Movie Cast and Characters: Complete List

The Avengers: Doomsday cast includes actors from the MCU, the X-Men films and the Fantastic Four reboot. Marvel mixes returning stars with new faces to build one of the largest lineups in the franchise.

Here is the main cast and the characters they play:

Actor	Character in Avengers: Doomsday
Robert Downey Jr.	Victor von Doom / Doctor Doom
Chris Hemsworth	Thor
Tom Hiddleston	Loki
Anthony Mackie	Sam Wilson / Captain America
Sebastian Stan	Bucky Barnes / Winter Soldier
Letitia Wright	Shuri
Paul Rudd	Scott Lang / Ant-Man
Florence Pugh	Yelena Belova
David Harbour	Red Guardian
Hannah John-Kamen	Ghost
Danny Ramirez	Falcon
Patrick Stewart	Charles Xavier / Professor X
Ian McKellen	Erik Lehnsherr / Magneto
Alan Cumming	Kurt Wagner / Nightcrawler
Tenoch Huerta	Namor
Winston Duke	M’Baku
Vanessa Kirby	Sue Storm

1. Robert Downey Jr. as Doctor Doom

Robert Downey Jr. plays Victor von Doom, the ruler of Latveria and the main villain of the film. Doom is one of the most powerful minds in Marvel Comics. He is a genius inventor who uses science and magic to chase control.

Downey’s casting marks a major moment for the franchise. He played Tony Stark for over a decade in the MCU. Now he takes on a new role as the film’s central antagonist.

2. Chris Hemsworth as Thor

Chris Hemsworth returns as Thor, the God of Thunder from Asgard. Thor has appeared in several MCU films, including the Avengers movies and Thor: Ragnarok. His return brings a familiar face back to the team.

3. Tom Hiddleston as Loki

Tom Hiddleston returns as Loki, the god of mischief and Thor’s adopted brother. Loki has been a fan favorite since his first MCU appearance. His presence adds a layer of unpredictability to the Avengers’ fight against Doom.

4. Sebastian Stan as Bucky Barnes

Sebastian Stan plays Bucky Barnes, also known as the Winter Soldier. Bucky has a long history with Captain America and has grown into a central figure in the MCU. Stan’s return connects the film to the Thunderbolts and Captain America storylines.

5. Anthony Mackie as Sam Wilson

Anthony Mackie returns as Sam Wilson, the former Falcon who later takes up the Captain America mantle. Sam carries the shield after Steve Rogers. His role keeps the Avengers’ legacy alive in the new era.

6. Patrick Stewart and Ian McKellen as Professor X and Magneto

Patrick Stewart returns as Charles Xavier, the founder of the X-Men. Ian McKellen returns as Erik Lehnsherr, known as Magneto. The two characters share a long and complex history in the X-Men films.

Their return marks one of the biggest X-Men reunions in the franchise. Fans of the original films will see familiar faces in a new Marvel setting.

7. Florence Pugh as Yelena Belova

Florence Pugh plays Yelena Belova, a former Black Widow assassin. Yelena first appeared in Black Widow and later joined the team in Thunderbolts. Her character brings emotional depth and sharp humor to the team.

8. Other Important Actors in Avengers: Doomsday

Apart from the lead actors, the film features several performers from the wider Marvel universe.

• Letitia Wright returns as Shuri, the brilliant princess of Wakanda and a key technology expert.
• Paul Rudd returns as Scott Lang, the Ant-Man, who brings a unique size-changing ability to the team.
• David Harbour plays Red Guardian, the Soviet super-soldier from Black Widow and Thunderbolts.
• Hannah John-Kamen returns as Ghost, the phasing assassin from Ant-Man and the Wasp.
• Danny Ramirez plays Falcon, the newest hero to carry the wings in the MCU.
• Tenoch Huerta plays Namor, the Sub-Mariner and ruler of Atlantis.
• Winston Duke plays M’Baku, the leader of the Jabari tribe in Wakanda.
• Vanessa Kirby plays Sue Storm, the Invisible Woman of the Fantastic Four.
• Alan Cumming returns as Nightcrawler, the teleporting mutant from the X-Men films.

9. Director, Producers and Story of Avengers: Doomsday

Avengers: Doomsday is produced by Marvel Studios and Kevin Feige. The film continues the Russo brothers’ legacy in the Avengers saga. Their work on Infinity War and Endgame set the stage for this new chapter.

The story brings the Avengers, X-Men and Fantastic Four together to face Doctor Doom. The film sets up the larger conflict that continues in Avengers: Secret Wars.

Here are some important details about the film:

Particulars	Details
Movie	Avengers: Doomsday
Studio	Marvel Studios
Producer	Kevin Feige
Lead Villain	Doctor Doom (Robert Downey Jr.)
Genre	Superhero, Action, Adventure, Sci-Fi
Language	English
Next Film	Avengers: Secret Wars

10. Avengers: Doomsday Release Date

Avengers: Doomsday is scheduled for a worldwide theatrical release on December 18, 2026. The film will arrive in IMAX and other premium formats. The release date sits on the same day as Dune: Part Three, which fans have nicknamed “Dunesday.”

The film is the first part of a two-film finale for this phase of the MCU. Avengers: Secret Wars follows it on December 17, 2027.

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