British actor Hugh Grant ended a glitzy party in London with a food fight after allegedly becoming embroiled in a spat with his former public relations manager.

The 'Notthing Hill' star was attending a birthday bash at nightspot Annabel's Wednesday night when his former representative, PR guru Matthew Freud, overheard the actor allegedly making a disparaging comment about him, reports contactmusic.com.

Freud reportedly retaliated by throwing chocolate cake at Grant, smearing the sweet treat all over the star's white shirt.

Grant then allegedly aimed a drink in his former associate's direction, but missed.

Freud is said to have left the party, while Grant was given a clean shirt to change into by venue staff and carried on with the festivities, partying with stars including his ex-girlfriend Elizabeth Hurley and Sir Michael Caine.