Ludacris urinated on Paul Walker's ''lucky plant'' during filming of 'Fast & Furious 6'.

The rapper-and-actor insists it was a prank-filled set on the car feature and he and Tyrese Gibson were determined to outdo each other in the jokes stakes.

Ludacris - who reprises his role as Tej Parker in the action franchise - admits his most outrageous stunt was when he showered his co-star Paul's beloved plant with wee.

He told BANG Showbiz: ''It's between me and Tyrese [to be the biggest prankster], but I think Tyrese would beat me in the points category because he just does not stop, he just keeps going.

''We played pranks on Paul Walker, on everybody. Google Ty Reece gets slapped by The Rock. I p***ed on Paul Walker's lucky plant that's outside of his trailer. Check that out - Ludacris p****s on Paul Walker's lucky plant!''

Ludacris - real name Christopher Brian Bridges - enjoyed working with the speedy vehicles again and thinks his female co-stars, Rita Ora and Michelle Rodriguez, would be the perfect companions to join him on a car ride.

When asked who his dream passenger on a fast car ride would be, he replied: ''Probably a bad woman, you gotta have a sexy woman with you. Probably Michelle Rodriguez, or Rita Ora - that's a person who could be in my passenger seat.''

Vin Diesel, DWAYNE 'THE ROCK' JOHNSON, Jordana Brewster and Luke Evans also star in 'Fast and Furious 6' which opens in cinemas on May 17.