Charlie Hunnam as Percival Fawcett

Robert Pattinson as Henry Costin

Sienna Miller as Nina Fawcett

Tom Holland as Jack Fawcett

Angus Macfadyen as James Murray

Edward Ashley as Arthur Manley

Clive Francis as Sir John Scott Keltie

Ian McDiarmid as Sir George Goldie

Franco Nero as Baron de Gondoriz

Matthew Sunderland as Dan

Johann Myers as Willis

Daniel Huttlestone as Brian Fawcett (15 Yr Old)

Harry Melling as William Barclay

Pedro Coello as Tadjui

Aleksandar Jovanović as Urquhart

Yelena Solovey as Madame Kumel

Bobby Smalldridge as Jack Fawcett (7 Yr Old)

Tom Mulheron as Jack Fawcett (3 Yr Old)

Nathaniel Bates Fisher as Brian Fawcett (7 Yr Old)

Murray Melvin as Lord James Bernard

Michael Jenn as Brigd-General Sidney Thornton

Michael Ford-FitzGerald as Hunt Leader

Frank Clem as Texas Gunman

Bethan Coomber as Joan Fawcett (7 Yr Old)

David Calder as Secretary Bryce

Stacy Shane as American Reporter

Pat Mooney as Random Scientist 3

Colin Carnegie as Random Scientist 2

Anthony Boyle as Trench Runner

Neil Bromley as Reporter 3

Bill Hurst as Reporter 1

Richard Croxford as Officer Thomas Busby

Louise Parker as Random Woman

Jose Pereira as Chief Guarayo

Gustavo Duque as Crew Member

Fernando Vigui as Diminutive Latino Man

Nicholas Agnew as John Coundley

Robert Fawsitt as Random Man at Port

Patrick McBrearty as Whipping Officer

Gary Crossan as Waiter @ Savage Club

Niall Cusack as Random Scientist

Nick Sampson as Doctor

Ruairí Heading as Other Soldier

David Coon as Random Scientist 4