Directing the cast of The Avengers is like "herding kittens", Jeremy Renner has joked.
Ahead of the premiere of The Avengers: Age Of Ultron, Renner told Good Morning Britain that director Joss Whedon has a hard task getting the cast, which includes Robert Downey Jr and Scarlett Johansson, to act professional - because they're all having so much fun.
The Avengers: Age of Ultron is the follow-up to the hit 2012 film Avengers Assemble - both of which were directed by Whedon.
Jeremy, who plays Clint Barton aka Hawkeye, said: "We have way too much fun together and just nothing gets done, so poor Joss has to deal with us."
The stars will be on the red carpet for the film's European premiere tonight.