An extended trailer for Marvel's Avengers: Age of Ultron has been released - watch it here.
Directed by Joss Whedon, the film stars Robert Downey Jr, Chris Hemsworth, Mark Ruffalo, Chris Evans, Scarlett Johansson, Jeremy Renner, Aaron Taylor-Johnson, Elizabeth Olsen, Paul Bettany and Cobie Smulders with James Spader and Samuel L Jackson.
Marvel says: "When Tony Stark jumpstarts a dormant peacekeeping programme, 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."
Marvel's Avengers: Age of Ultron will be released in April 2015.
