Andy Serkis in "Avengers: Age of Ultron." Marvel has yet to disclose his character, rumored to be Hydra leader Baron Von Strucker.
Chris Evans as Captain America in "Avengers: Age of Ultron."
Aaron Johnson as Quicksilver in "Avengers: Age of Ultron." You may remember his Fox equivalent in "X-Men: Days of Future Past."
Scarlett Johansson as Black Widow in "Avengers: Age of Ultron."
Mark Ruffalo as the Hulk in "Avengers: Age of Ultron."
Scarlett Johansson and Joss Whedon behind the scenes of "Avengers: Age of Ultron."
Jeremy Renner and Joss Whedon behind the scenes of "Avengers: Age of Ultron."
Chris Evans as Captain America and Chris Hemsworth as Thor in "Avengers: Age of Ultron."
An Ultron minion in "Avengers: Age of Ultron."
Robert Downey, Jr. as Tony Stark in "Avengers: Age of Ultron."
Ultron in "Avengers: Age of Ultron."
Joss Whedon on the set of "Avengers: Age of Ultron."
Hulkbuster armor, ready to do battle in "Avengers: Age of Ultron"
Elizabeth Olsen as Scarlet Witch in "Avengers: Age of Ultron."
Mark Ruffalo as Bruce Banner in "Avengers: Age of Ultron."
