Jonah Hill got punked by his co-star P Diddy.

The actor said that on a night out with the rapper during filming of 'Get Him To The Greek', Diddy convinced him that he had a loaded gun as they were driving in the actor's car, according to Cinema Blend.

Hill said: "He called shotgun in my car, so I'm driving down the street... he's drinking a bottle of vodka and then he puts his foot down on the gas level... We're going, like, 100 miles an hour, [he] swerves the car into the other lane and then goes, 'Have you ever driven with a loaded gun in the car?' I'm, like, freaked out... I'm scared of Diddy.

"He tells me the other day... 'I was totally messing with you,man!' That was water in the [vodka] bottle, there was no gun in the car. He was doing it totally as a joke... It's, like, 'Wow, Diddy's actually hilarious'."

Diddy performed on 'Good Morning America' on Friday morning - did you catch the show? Check out the snaps...