Simon Pegg got himself a new fan during the filming of Mission: Impossible - Ghost Protocol.
His co-star Jeremy Renner described the British actor as a "comic genius".
Simon, Jeremy and Paula Patton join Tom Cruise in the latest instalment of the blockbuster action franchise, with Jeremy playing IMF analyst William Brandt.
And Hurt Locker star Jeremy said "learning from the comic genius of Simon Pegg," was the highlight of filming.
Simon, who first appeared in Mission: Impossible III, reprises the role of tech genius Benji Dunn in the new movie.
But Jeremy didn't let the star of the franchise escape his praise - he said Tom had acted as a mentor to him.
"The amount I learned was immense, I can't even begin to speak about how much it was, but I'm so grateful for it," Jeremy revealed.