The gang's all here! The Avengers flocked to Hollywood last night to hang out with Jimmy Kimmel on Jimmy Kimmel Live last night -- and it was a whole lotta fun!

During the group sit down, actors Mark Ruffalo, Chris Hemsworth, Chris Hemsworth, Scarlett Johansson, Robert Downey Jr. and Jeremy Renner joked about how filming the new Avengers film, Avengers: Age of Ultron, was like a high school reunion. Not gonna lie -- we wish we'd gone to that high school!

RDJ also added the filming was a hoot because Scarlett, who plays sexy vixen Black Widow, was pregnant during filming. The Iron Man said, "[Filiming] was magical too because little missy over here was knocked up."

ScarJo sarcastically added, "It's great to wear a tight fitting catsuit when you are humungous."

In the new flick, the Avengers facing a new foe, Ultron, an intelligent robot with the voice of James Spader, who will stop at nothing in an attempt to destroy mankind. Ultron poses a major threat to the future of mankind and it's up to the Avengers to squash his path of destruction!

Iron Man, Thor (Hemsworth), Captain America (Evans), The Hulk (Ruffalo), Hawkeye (Renner), and Black Widow must band together again to save the world!

Avengers: Age of Ultron, written and directed by Buffy the Vampire Slayer's Joss Whedon, slams into theaters on May 1, 2015.