'Avengers: Age of Ultron' premiere: Cast tells you what to expect from sequel

Marvel superheroes assembled on the Hollywood red carpet on Monday night for the premiere of the much-anticipated blockbuster "The Avengers: Age of Ultron". Robert Downey Jr, Chris Hemsworth, Scarlett Johansson and Chris Evans drew loud cheers from fans outside the Dolby Theatre. The movie also stars Samuel L. Jackson, Jeremy Renner and Elizabeth Olsen. The plot sees Tony Stark try to jumpstart a peacekeeping programme. When things go wrong, the superheroes - Iron Man, Captain America, Thor, The Incredible Hulk, Hawkeye and Black Widow, have to stop villain Ultron's destructive plans.