Robert Downey Jr., Chris Evans, Mark Ruffalo, Scarlett Johansson, Jeremy Renner and Chris Hemsworth can get super serious on screen while saving the world, but in real life, the group clearly has no trouble letting loose and messing around. Shortly before the world premiere of Avengers: Age of Ultron, they appeared on Jimmy Kimmel Live and participated in a slew of amusing bits including an Avengers edition of Family Feud. That one's definitely my favorite, but the "Science Bros" clip and the "Wall of America" Q&A are pretty amusing as well. All in all, these guys are hilarious, fun-loving and make me love the MCU even more than I already do.

You can check out all eight Avengers: Age of Ultron Jimmy Kimmel clips below. The film opens in 3D on May 1st and also stars Samuel L. Jackson, Elizabeth Olsen, Aaron Taylor-Johnson and James Spader.

Click here for all of our Avengers: Age of Ultron coverage or browse the recent links below:

• New AVENGERS: AGE OF ULTRON Clips: It’s Iron Man vs. Ultron
• New AVENGERS: AGE OF ULTRON Clip Finds Black Widow Calming a Moody Hulk
• Spider-Man Is Not in AVENGERS: AGE OF ULTRON, Says Kevin Feige
• Joss Whedon Says He’s Taking a Break from Marvel
• AVENGERS: AGE OF ULTRON Clip Shows 90 Seconds of Hulk vs. Hulkbuster Goodness
• AVENGERS: AGE OF ULTRON Cast and Filmmakers Talk Challenges, New Characters & Thanos
• AVENGERS: AGE OF ULTRON Behind-the-Scenes Footage Offers 8 Minutes of Access to Set
• AVENGERS: AGE OF ULTRON: 5 More Images Continue to Build Anticipation