Russell Crowe:Captain Jack Aubrey;Paul Bettany:Dr. Stephen Maturin;James D'Arcy:1st Lt. Tom Pullings;Edward Woodall:2nd Lt. William Mowett;Chris Larkin:Capt. Howard;Max Pirkis:Blakeney;Lee Ingleby:Hollom;Billy Boyd:Barrent Bonden;Joseph Morgan:William Warley, Cpt. of Mizzentop;Richard McCabe:Mr. Higgins;Robert Pugh:Mr. Allen;Jack Randall:Boyle;Max Benitz:Calamy;Richard Pates:Williamson;Ian Mercer:Mr. Hollar;Tony Dolan:Mr. Lamb;David Threlfall:Preserved Killick;Bryan Dick:Joseph Nagle;George Innes:Joe Plaice;William Mannering:Faster Doudle;Patrick Gallagher:Awkward Davies;Alex Palmer:Nehemiah Slade;Mark Lewis Jones:Mr. Hogg;John DeSantis:Padeen;Ousmane Thiam:Black Bill;Thierry Segall:French Captain