Director Joss Whedon revealed back in March that it was a 'nightmare' to shoot Avengers: Age of Ultron, which he called "the hardest juggling act" he has ever tried to pull off. We get a bit of insight into this "juggling act" with a new featurette, where Jeremy Renner reveals that the Avengers are together a lot in this sequel, which is great for the actors but "terrible for Joss, because it's tough to wrangle 10 crazy actors who love each other." Joss Whedon reveals that it's "a delight" that the cast is so comfortable with each other, while admitting that, at times, it can be an "exhausting delight."

We also hear from Chris Evans, who compared the filming experience to "summer camp," because "it doesn't feel like work at all." Robert Downey Jr. also adds that there is a "real sense of unity" between the cast members, which is clearly illustrated in a number of candid behind-the-scenes shots, including one where Chris Hemsworth is seen literally dragging Scarlett Johansson and Chris Evans back to work. We also get a few new scenes mixed in with the candid behind-the-scenes footage.

Avengers: Age of Ultron is the epic follow-up to the biggest Super Hero movie of all time. When Tony Stark tries to jumpstart 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 the fate of the planet hangs in the balance. As the villainous Ultron emerges, it is up to The Avengers to stop him from enacting his terrible plans, and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure. Take a look at the featurette below, and stay tuned for more from Avengers: Age of Ultron as we get closer and closer to the May 1 release date.