Florian David Fitz as Carl Friedrich Gauß

Albrecht Schuch as Alexander von Humboldt

Vicky Krieps as Johanna Gauss

Jérémy Kapone as Aimé Bonpland

Katharina Thalbach as Mrs. Gauß

David Kross as Eugen Gauß

Max Giermann as Military Man

Georg Friedrich as Slave Trader

Detlev Buck as Angry Man

Sven Regener as Natural Scientist I

Leander Haußmann as Natural Scientist II

Daniel Kehlmann as Spooky Man

Sunnyi Melles as Marie Elizabeth von Humboldt

Karl Markovics as Lehrer Büttner

Michael Maertens as Herzog von Braunschweig

Peter Matic as Immanuel Kant

Paul Lux as Wilhelm von Humboldt (Kid)

Sebastian Brandes as Wilhelm von Humboldt

Anastasiia Kirilik as Nina

Agi Ariunsaichan Dawaachu as Translator

Guntbert Warns as Father Gauss

Àlex Brendemühl as Father Zea

Ronald Kukulies as Butcher

Thomas Loibl as Barber

Anna Unterberger as Minna

Michael Schenk as King of Prussia

Johannes Zeiler as Gendarmerie Commander Vogt

Tatiana Merizalde Dobles as Indian Bonpland

Pascal Fiedler as Schoolboy I

Moritz Adler as Schoolboy II

Nino Nervi as Eugen Gauß (Kid)

Lennart Hänsel as Carl Friedrich Gauß (Kid)

Aaron Denkel as Alexander von Humboldt (Kid)