‘Avengers: Age of Ultron’ Trailer Leaked Online: See Tony Stark, Thor, Captain America in First Sneak Peek (WATCH)

The first trailer for "Avengers: Age of Ultron" has leaked online ahead of its Oct. 28 debut. Marvel announced on Wednesday (Oct. 22) that the trailer for "Avengers 2" would be shown during next week's episode of "Agents of SHIELD," but Movieweb has already posted the two-minute video online.

In the clip - embedded below - James Spader narrates as Ultron. Tony Stark (Robert Downey Jr.), Bruce Banner (Mark Ruffalo), Captain America (Chris Evans), Thor (Chris Hemsworth), Black Widow (Scarlett Johansson), Hawkeye (Jeremy Renner), Quicksilver (Aaron Taylor-Johnson), and Scarlet Witch (Elizabeth Olsen) make an appearance.

ComicBookResources.com pointed out that the leaked trailer could be an international version because the release date says April. "Avengers: Age of Ultron" is expected to hit theaters on May 1, 2015 in the U.S.

Marvel also released an official synopsis of the film, which reads, "While Tony Stark jumpstarts a dormant peacekeeping program, things go awry and Earth's Mightiest Heroes, including Iron Man, Captain America, Thor, The Incredible Hulk, Black Widow and Hawkeye, are put to the ultimate test as they battle to save the planet from destruction at the hands of the villainous Ultron."

Check out the leaked trailer below and tell us what you think in the comments section below.

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