When a Chinese rebel murders Chon's estranged father and escapes to England, Chon and Roy make their way to London with revenge on their minds.

Jackie Chan
as Chon Wang

Owen Wilson
as Roy O'Bannon

Fann Wong
as Chon Lin

Aidan Gillen
as Lord Nelson Rathbone

Donnie Yen
as Wu Chow

Tom Fisher
as Arthur 'Artie' Doyle

Aaron Taylor-Johnson
as Charlie Chaplin

Alison King
as Prostitute

Constantine Gregory
as The Mayor

Anna-Louise Plowman
as Debutante