Aldo Sambrell as George Merry
Andrés Mejuto as Billy Bones
Angel del Pozo as Dr. Livesey
Barta Barri as Black Dog
Emilio Rodriguez as Joyce
George Rigaud as Captain Flint
Jean Lefebvre as Ben Gunn
John Cater as Job Anderson
Kim Burfield as Jim Hawkins
Luis Induni as Hunter
Maria Rohm as Mrs. Hawkins
Michel Garland as Israel Hands
Orson Welles as Long John Silver
Paul Muller as Blind Pew
Rafer Johnson as Dick Johnson
Rik Battaglia as Captain Smollett
Tomás Blanco as Mr. Arrow
Victor Israel as Tom Morgan
Walter Slezak as Squire Trelawney