• 
• Christopher Plummer
• Francisco Pizarro
  

• 
• David Carradine
• Atahuallpa
  

• 
• George Rose
• Martin Ruiz
  

• 
• Cal Bellini
• Pedro de Candia
  

• 
• Robert Aberdeen
• Chieftain
  

• 
• Barry Burns
• Peruvian Indian
  

Replacement

• 
• Clyde Burton
• Juan Chavez
  

Replacement

• 
• Tony Capodilupo
• Vasca
  

• 
• Paul Charles
• Peruvian Indian
  

Replacement

• 
• Kurt Christien
• Peruvian Indian
  

Replacement

• 
• John Church
• Pedro Chavez
  

• 
• Paul Collins
• Martin Ruiz as a boy
  

• 
• Clayton Corbin
• Challcuchima
  

• 
• Thayer David
• Miguel Estete
  

• 
• Jake Dengel
• Rodas
  

• 
• B.J. DeSimone
• Peruvian Indian
  

Replacement

• 
• Edilio Ferraro
• Peruvian Indian
  

Replacement

• 
• Ben Hammer
• Fray Vincente de Valverde
  

• 
• Judd Jones
• Headman
  

• 
• Michael Lamont
• Diego de Trujillo
  

• 
• Sandy Leeds
• Oello
  

• 
• Michael Levin
• Fray Marcos de Nizza
  

• 
• Roy Lozano
• Peruvian Indian
  

Replacement

• 
• Marc Maskin
• Manco
  

• 
• Hechter Ubarry
• Peruvian Indian
  

Replacement

• 
• Ken Novarro
• Peruvian Indian
  

Replacement

• 
• Nelson Phillips
• Salinas
  

• 
• Mylo Quam
• Villac Umu
  

• 
• Gregory Rozakis
• Felipillo
  

• 
• George Sampson
• Domingo
  

• 
• Julie Sheppard
• Inti Coussi
  

• 
• Don Silber
• Peruvian Indian
  

Replacement

• 
• John Vernon
• Hernardo de Soto
  

Replacement

• 
• Robert Aberdeen
• Felipillo
  

• 
• Barry Burns
• Manco
  

• 
• Tony Capodilupo
• Miguel Estete
  

• 
• Paul Charles
• Martin Ruiz as a boy
  

• 
• Kurt Christien
• Pedro Chavez
  

• 
• John Church
• Domingo
  Fray Marcos de Nizza
  Fray Vincente de Valverde
  

• 
• Clayton Corbin
• Atahuallpa
  

• 
• Thayer David
• Martin Ruiz
  

• 
• B.J. DeSimone
• Diego de Trujillo
  

• 
• Roy Lozano
• Chieftain
  

• 
• Marc Maskin
• Headman
  

• 
• George Sampson
• Pedro de Candia
  Rodas
  Salinas
  Vasca
  

• 
• Don Silber
• Challcuchima
  Villac Umu
  

• 
• Herbert Harris
• Musical Director
  Musician
  

• 
• Norman Grossman
• Associate Conductor
  Musician
  

• 
• Steve Silverman
• Musician
  

• 
• Charles Birch
• Musician
  

• 
• Peter Shaffer
• Writer
  

• 
• John Dexter
• Director
  

• 
• Claude Chagrin
• Choreographer
  

• 
• Michael Annals
• Scenic Design
  Costume Design
  

• 
• Cynthia Scott
• Indian Headdresses
  

• 
• William Wallace Bellin
• Spanish armor and helmets
  

• 
• Ray Diffen Stage Clothes
• Costumes executed
  

• 
• Martin Aronstein
• Lighting Design
  

• 
• Marc Wilkinson
• Sound Effects
  Incidental Music
  

• 
• John Haag Jiras
• Make-up for Christopher Plummer
  

• 
• John Gunther
• Masks for Lament scene
  

• 
• George Jenkins
• New York Production Supervised
  

• 
• Ben Edwards
• New York Production Supervised
  

• 
• Randall Brooks
• Production Stage Manager
  

• 
• Maxine S. Taylor
• Stage Manager
  

• 
• Robert Bishop
• Assistant Stage Manager
  

• 
• Alan Shayne Associates
• Casting
  

• 
• Paul Libin
• General Manager
  

• 
• Merle Debuskey
• General Press Representative
  

• 
• Violet Welles
• Press Representative
  

• 
• Lawrence Belling
• Press Representative
  

• 
• Brownstone Associates
• Advertising
  

• 
• The Theatre Guild
• Producer
  

• 
• Theodore Mann
• Producer
  

• 
• Gerald Oestreicher
• Producer
  

• 
• Hope Abelson
• Produced in association with
  

• 
• Don Herbert
• Associate Producer
  

• 
• David Susskind
• Produced by arrangement with
  

• 
• Daniel Melnick
• Produced by arrangement with
  

• 
• Walter Fried
• Producer's Representative Theatre Guild-Oestreicher