In Avengers: Infinity War (2018), the story follows the Avengers as they clash with the cosmic villain Thanos. The lead cast includes Robert Downey Jr. as Tony Stark / Iron Man, Chris Hemsworth as Thor, and Josh Brolin voicing Thanos.
Main cast
- Tony Stark / Iron ManRobert Downey Jr.Main
- ThorChris HemsworthMain
- ThanosJosh BrolinMain
- Steve Rogers / Captain AmericaChris EvansMain
- Natasha Romanoff / Black WidowScarlett JohanssonMain
- Bruce Banner / HulkMark RuffaloMain
Supporting cast
- Peter Parker / Spider-ManTom HollandSupp
- Doctor StrangeBenedict CumberbatchSupp
- GamoraZoe SaldañaSupp
- Star-Lord / Peter QuillChris PrattSupp
- Wanda Maximoff / Scarlet WitchElizabeth OlsenSupp
- VisionPaul BettanySupp
Guest & voice
- Pepper PottsGwyneth PaltrowGuest
- Ebony MawTom Vaughan-LawlorGuest
- Proxima MidnightCarrie CoonVoice
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About this cast
Avengers: Infinity War is the third Avengers film and a landmark crossover event in the Marvel Cinematic Universe. The movie pits Earth’s mightiest heroes and the Guardians of the Galaxy against the mad Titan Thanos, who seeks to collect all six Infinity Stones to destroy half of all life in the universe. The ensemble cast features an unprecedented number of returning Marvel characters, with…
FAQs
Who plays Tony Stark / Iron Man in Avengers: Infinity War?
Robert Downey Jr. reprises his role as Tony Stark / Iron Man in the film.
Who plays the villain Thanos in Avengers: Infinity War?
Josh Brolin provides both the voice and motion capture performance for Thanos.
How many characters appear in Avengers: Infinity War?
The film has an enormous ensemble of over 20 named characters from across the Marvel Cinematic Universe, including the main Avengers, the Guardians of the Galaxy, and several supporting heroes.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026