The 33-year-old rapper hired the entire VIP area for his entourage, friends and film colleagues.
And he’s not even the star – being officially billed behind Tamer Hassan, Danny Dyer… and Brenda Blethyn.
A guest at the party said: ‘When he arrived at the club it was mayhem. The area was cleared for him and security ushered him straight through. On his table were bottles of champagne but he wanted a magnum bottle of Ace Of Spades champagne.
‘You could tell that he was loving all the attention as people were trying to take pictures on their phones and were shouting his name.’
50 Cent – real name Curtis Jackson but also known as ‘Fiddy’ – plays a gangster and loan shark called Mr Thigo in the film, a character not a long way away from his real-life past.
Earlier that evening, 50 had been wearing a smarter grey suit as he posed alongside singer Jamelia at the Leicester Square screening as part of the London Film Festival.