Robert Woods as Gregor MacGregor

Fernando Sancho as Miguel

Agata Flori as Rosita Carson

Leo Anchóriz as Santillana

Manuel Zarzo as David MacGregor

Nazzareno Zamperla as Peter MacGregor

Paolo Magalotti as Kenneth MacGregor

Julio Pérez Tabernero as Mark MacGregor

Saturno Cerra as Johnny MacGregor

Alberto Dell'Acqua as Dick MacGregor

Perla Cristal as Perla

George Rigaud as Alastair MacGregor

Massimo Righi as Bandido

Francesco Tensi as Harold MacGregor

Ana María Noé as Mamie MacGregor

Margherita Horowitz as Annie MacGregor

Rafael Bardem as Judge Garland

Antonio Molino Rojo as Sheriff John F. Mason

Cris Huerta as Crawford

Pierre Cressoy as Bandido

Manuel Bermúdez 'Boliche' as Santillana Henchman (uncredited)

Xan das Bolas as Barman (uncredited)

Rafael Hernández as Barman (uncredited)

Antonio Iranzo as Bandido (uncredited)

Víctor Israel as Pianist (uncredited)

José Luis Lluch as Bandido (uncredited)

Ángel Menéndez as Banquero (uncredited)

Guillermo Méndez as Bandido (uncredited)

Nazzareno Natale as Bandido (uncredited)

Antonio Orengo as Horse Seller (uncredited)

Antonio Padilla as Bandido (uncredited)

Joaquín Parra as Santillana Henchman (uncredited)

José Riesgo as Carcelero (uncredited)

Leonardo Scavino as Bank Director (uncredited)

Pilar Truchado as Barbara (uncredited)

Antonio Montoya as Santillana Henchman (uncredited)