The five are: Gerard Butler, Tom Wilkinson, Thandie Newton, Idris Elba and Chris "Ludacris" Bridges.
The Hollywood Reporter says Butler stars as a One Two, a street-smart mobster who has learned to play both sides of the fence, and Wilkinson is playing the lethal head mobster, Lenny Cole, part of London's old mob regime, which is quickly losing ground to the wealthier foreign mob.
The trade adds that Thadie Newton's character acts as One Two's love interest, Stella, an accountant with ties to the underworld, and Elba appears as Mumbles, One Two's partner. Bridges is playing Roman, an American trying to break into the music scene in London. Quite fitting.
The film has already started shooting in London. Guy Ritchie directs from his own script.
Joel Silver is producing the movie, along with Ritchie, Susan Downey and Steve Clark-Hall.