Confirmed Cast & Characters
23 confirmed cast members — returning Avengers, the Fantastic Four, and Robert Downey Jr. back as Doctor Doom.
Robert Downey Jr. returns to the MCU — but not as Tony Stark. He plays Doctor Doom, making his return one of the most dramatic recastings in franchise history.
Avengers
Fantastic Four
New Heroes
Villains & Allies
How to Prepare for Doomsday
With 23 characters converging, preparation matters. These are the key titles to watch before Avengers: Doomsday — grouped by which cast members they introduce or develop.
All Avengers films + Falcon & Winter Soldier + Loki S1 & S2 + Captain America: Brave New World
The Fantastic Four: First Steps (2025) — their MCU origin. No prior films required.
Daredevil: Born Again + Hawkeye + Black Widow (for Yelena) + Falcon & Winter Soldier (for US Agent)
No MCU solo film — Avengers: Doomsday is his introduction. Robert Downey Jr. plays an entirely new character.
Frequently Asked Questions
Who is in the cast of Avengers: Doomsday?
23 confirmed cast members: Anthony Mackie (Captain America), Robert Downey Jr. (Doctor Doom), Pedro Pascal (Reed Richards), Chris Hemsworth (Thor), Benedict Cumberbatch (Doctor Strange), Tom Holland (Spider-Man), the full Fantastic Four team, and many more.
Who is Robert Downey Jr. playing in Avengers: Doomsday?
Robert Downey Jr. returns as Doctor Doom — not Tony Stark. This is a brand-new character role. Doctor Doom is one of Marvel's most powerful villains and ruler of Latveria.
Are the Fantastic Four in Avengers: Doomsday?
Yes. Pedro Pascal (Reed Richards), Vanessa Kirby (Sue Storm), Joseph Quinn (Human Torch), and Ebon Moss-Bachrach (The Thing) are all confirmed — crossing over from The Fantastic Four: First Steps (2025).
What should I watch before Avengers: Doomsday?
Most critical: all Avengers films, Loki S1 & S2, Captain America: Brave New World, The Fantastic Four: First Steps, Daredevil: Born Again, and Falcon & Winter Soldier. See the complete Before Doomsday guide.