NEW YORK: Britney Spears' ex-boyfriend, paparazzo Adnan Ghalib, has pleaded not guilty to assaulting a process server.

Ghalib is accused of running over Ram Moskowitz as he tried to hand the photographer legal papers as part of the Toxic superstar's conservatorship case in 2008.

The snapper is facing felony assault with a deadly weapon, battery and hit and run charges.

He is due back in court in Van Nuys, California on 29 September (09).

Ghalib faces seven years behind bars if he's found guilty.