According to the Daily Mirror's 3AM Girls, the fight took place at a London club called Aura after the premiere of Leo's film Blood Diamond - which just earned him an Oscar nomination for Best Actor. Spies claim that Leo had been in bad spirits all evening, but he was at his worst at Aura. Though he should have been celebrating, the actor instead sulked and text messaged at his table.

A fellow clubgoer said, "His friends were having a good time but Leo just sat there looking really glum and texting all night. Then as they were leaving, Leo's phone rang and he started having a heated conversation." DiCaprio was overheard saying over the phone, "I've had enough of this," as he held his head in his hands. Clearly upset, he became agitated when the paparazzi tried to photograph his exit from the club. The source says, "He was like, 'don't you take my picture!' He was clearly in the middle of something and the last thing he needed was flashbulbs going off in his face."

Was it Bar who called Leo? They are said to be going through a rough patch right now. As one pal of the actor says, "He was really into Bar in the beginning but now he's kinda getting to the end of his tether. He finds her really clingy and being apart because of work causes rows."