Directed by Joss Whedon (“Marvel’s The Avengers”), the film returns its iconic cast, including Robert Downey Jr. (“Iron Man 3,” “Marvel’s The Avengers”) as Tony Stark/Iron Man along with Chris Hemsworth (“Thor: The Dark World,” “Marvel’s The Avengers”) as Thor, Mark Ruffalo (“Marvel’s The Avengers,” “Now You See Me”) as Hulk, Chris Evans (“Captain America: The Winter Soldier,” “Marvel’s The Avengers”) as Captain America, Scarlett Johansson (“Captain America: The Winter Soldier,” “Marvel’s The Avengers”) as Black Widow, Jeremy Renner (“American Hustle,” “Marvel’s The Avengers,”) as Hawkeye, and Samuel L. Jackson (“Captain America: The Winter Soldier,” “Marvel’s The Avengers”) as Nick Fury. Joining the cast are Aaron Taylor-Johnson (“Godzilla,” “Kick Ass 2”) as Quicksilver, Elizabeth Olsen (“Godzilla”) as Scarlet Witch and James Spader (“The Blacklist,” “Lincoln”) as Ultron.
Yes, that doesn’t sound like a movie with far too many main characters at all. (Not listed: the already announced Paul Bettany as Jarvis and Thomas Kretschmann as Baron Von Strucker, as well as the rumored Cobie Smulders as Maria Hill, Clark Gregg as Agent Coulson and Don Cheadle as Iron Patriot/War Machine).
(From Marvel PR email about Avengers: Age of Ultron.)