The World Premiere of 'Avengers: Age of Ultron' at the Dolby Theatre in Hollywood brought out the stars from the movie including Chris Hemsworth, Robert Downey Jr., Scarlett Johansson, Director Joss Whedon, Aaron Taylor-Johnson, James Spader, Jeremy Renner, Chris Evans, Mark Ruffalo, Producer Kevin Feige, Creator Stan Lee and much more. Check it out.