On June 21, 2013, Marvel announced that Robert Downey Jr. officially signed the "Avengers 2: Age of Ultron" film contract. On August 30, Cannes actor James Spade decided to play the big villain Ultron. On October 30th, British actor Aaron Taylor-Johnson confirmed his role as "Quick Silver" in the film. In mid-November of the same year, Elizabeth Olsen revealed in an interview with MTV that she had officially joined the "Avengers 2: Age of Ultron" and starred in the "Red Witch". On the 12th, on the 13th, Don Cheadle , who played Gears of War () in the "Iron Man" series, confirmed to join the film.
In mid-January 2014, German actor Thomas Kreischmann confirmed to play the second villain in the film, Baron Wolfgang von Stark, to help Ultron. In early February, "Avengers 2: Age of Ultron" added a new villain, "Vision Vision", and British actor Paul Bettany will play the role. At the beginning of March, it was officially confirmed that South Korean actress Soo Hyun joined "Avengers 2: Age of Ultron". The role is unknown. At the end of May, Hollywood actor Josh Brolin confirmed to be the voice of the villain Thanos in "Avengers 2: Age of Ultron". In early July 2014, Andy Serkins revealed to the media that he would represent his "Fantasy Show" company as a consultant for the film. And worked closely with the "Hulk" actor Mark Ruffalo to give the latter guidance. In mid-July, Stan Lee confirmed a guest appearance in "Avengers 2: Age of Ultron". At the end of October, Idris Elba, who played the "door god" Heimdall in the "Thor" series, revealed in an interview with the "Guardian" that he and Chris Hemsworth and Tom Sid Luston made a part of the film, suggesting that he and Tom Hiddleston will join the film.
