'Greek' star Russell Brand slapped by Rose Byrne, bled internally

greek-rose-byrne-russell-brand.jpg Russell Brand had to suffer for his art in "Get Him to the Greek." And he's not above complaining about it.

He got burned by flying sparks, had to do a naked threesome and bare his  bum which a cameraman called "horrible." Then his costar Rose Byrne slapped him -- hard -- during an improvised argument.

"Rose Byrne hit me in the face," he tells The Dish Rag. "It wasn't in the script.  She hit me. I complained to Nick [Stoller] the director, who said I was making a fuss."