Peter Lee Lawrence as William 'Billy the Kid' Bonney

Fausto Tozzi as Pat Garrett

Dyanik Zurakowska as Helen Tunstill

Gloria Milland as Mrs. Kathleen Bonney

Carlos Casaravilla as Jackson Murphy

Antonio Pica as Mark Travis

Luis Prendes as John Tunstill

Enrique Ávila as Hank - Fort Summer Saloonkeeper

Orlando Baralla as Governor of New Mexico

Francisco Sanz as Peddler

Luis Rivera as Mark Liston

Barta Barri as Rancher - Tunstill's Neighbor

Alfonso Rojas as Paul Powers - Tunstill's Foreman

Luis Induni as Maurice - Travis's Henchman

Milo Quesada as Raul Alonso - Rustler Leader

Miguel Palenzuela as Peter 'Mac' MacGregor

Antonio Molino Rojo as Tom MacGregor

Manuel Alexandre as Manuel Albarca - Gravedigger

Miguel de la Riva as Cavalry Lieutnant

Tomás Blanco as Peter - Helen's Uncle

Margot Cottens as Mrs. Huerte

Carmen Porcel as Mrs. Patterson

Alfredo Santacruz as General

Gonzalo de Esquiroz as Greg - Travis's Henchman

José Canalejas as Jake - Travis's Henchman

Alfonso de la Vega as Hols - Travis's Henchman

Santiago Rivero as Silver City Saloonkeeper

María Isbert as Cotilla

Erasmo Pascual as Erasco Colmenero

Adriano Domínguez as

Mario Filippo as

Miguel Armario as Ciudadano (uncredited)

Simón Arriaga as Pablo - Garcia's Henchman / Cattle Rustler (uncredited)

Luis Barboo as MacGregor's Henchman (uncredited)

Chiro Bermejo as Bocazas (uncredited)

Fernando Bilbao as Aguador (uncredited)

Frank Braña as Murphy's Henchman (uncredited)

Juan Cazalilla as Barman (uncredited)

Antonio Cintado as Aguador (uncredited)

Álvaro de Luna as Aguador (uncredited)

Tito García as Francisco (uncredited)

Pilar Gómez Ferrer as Ciudadana (uncredited)

Rafael Hernández as Ciudadano (uncredited)

Rufino Inglés as Ciudadano (uncredited)

José Luis Lizalde as Hotelero (uncredited)

Ángel Menéndez as Jugador (uncredited)

Antonio Orengo as Mexican Landowner (uncredited)

José Orjas as José Gonzalez (uncredited)

José Riesgo as Comprador de armas (uncredited)

Vicente Roca as Ciudadano (uncredited)

Emilio Rodríguez as Store Customer (uncredited)