Joseph Fiennes as Martin Luther

Jonathan Firth as Girolamo Aleander

Claire Cox as Katharina von Bora

Alfred Molina as Johann Tetzel

Peter Ustinov as Frederick

Bruno Ganz as Johann von Staupitz

Uwe Ochsenknecht as Leo X

Maria Simon as Hanna

Mathieu Carrière as Cardinal Jacob Cajetan

Benjamin Sadler as Georg Spalatin

Jochen Horst as Andreas Karlstadt

Marco Hofschneider as Ulrich

Anian Zollner as Philipp von Hessen

Herb Andress as Gunter

Torben Liebrecht as Charles V

Lars Rudolph as Philip Melanchton

Christopher Buchholz as Von der Eck

Timothy Peach as Von Miltitz

Felix Klare as Student

Jens Winter as Fugger-Revisor

Florian Panzner as Student

Anatole Taubman as Otto

Tom Strauss as George of Brandenburg

Gene Reed as John of Saxony

Johannes Lang as Albert, Archbishop of Mainz

Jeff Boyd as Prior

Jeff Caster as Matthew

Hussi Kutlucan as Blacksmith

Michael Traynor as Hans Luther

Joost Siedhoff as Old Monk

Lena Krimmel as Theresa

Doris Prusova as Grete

Jindrich Fajst as Thomas

Jan Nemejovský as Albert's Secretary

Jiří Maria Sieber as Executioner