Eminem stormed out of the MTV Movie Awards last night after he was the victim of a prank by actor Sacha Baron Cohen.

The incident took place when Sacha, who was dressed as his gay alter ego Bruno, arrived to present the award for Best Male Performance.

The actor was gradually lowered from the ceiling of the Gibson Amphitheatre in Los Angeles until he landed in Eminem's lap.

The rapper, who had Sacha's jock strap in his face, appeared furious to find himself the butt of the joke.

“Are you f*cking serious?” he shouted, before adding more expletives.

Mocking one of Eminem's most famous hits, the actor replied: “Is the real Slim Shady about to stand up?”

As Eminem's bodyguards struggled to remove the actor from the rapper's lap, Cohen added: "Hey, don't touch me guys. I've already got a boyfriend. Hey guys, let's continue this in my hotel room!"

Eminem and his entourage then left the auditorium, while Sacha presented the award to a confused looking Zac Efron.

The incident, which was broadcast live on MTV, came just after Eminem had performed a medley of songs from his latest album Relapse at the awards ceremony.

See the incident as it happened below:

Eminem storms out of MTV Movie Awards