Sjur Vatne Brean as Gunnar Sønsteby (young)

Erik Hivju as Gunnar Sønsteby (old)

Philip Helgar as Edvard Tallaksen

Magnus Dugdale as Andreas Aubert

Jakob Maanum Trulsen as Erling Solheim

Jacob Jensen as Jens Christian Hauge

Flo Fagerli as Anne Solheim

Ines Høysæter Asserson as Reidun Andersen

Lisa Loven Kongsli as Gudrun Collett

Martin Karelius Østensen as Philip Hansteen

August Wittgenstein as Siegfried Fehmer

Per Kjerstad as Karl Marthinsen

Jørgen Cleve Broch as Knut Haugland

Sigurd Solheim as Henrik Hop

Lars August Jørgensen as Birger Rasmussen

Ulrik William Græsli as Gregers Gram

Benjamin Myhre as Max Manus

Svein Sturla Hungnes as Einar Forfang

Cato Skimten Storengen as Petter Ringen Johannesen

Mads Henning Jørgensen as Gunnar Sønsteby

William Gundersen as Arne Gundereid

Tiril Pharo as Margit Lien

Lars Berge as Oscar Beck

Benjamin Noble as Daniel Ring

Terje Strømdahl as Elderly Drunk Man

Espen Lervaag as Vidkun Quisling

Jacob Nasseri as Arthur Pevik

Morten Rudå as Sverre Hornbæch

Lukas Petrauskas as Gunnar Lindvig

Tobias Aksdal as Halvor Rivrud

Marianne Jonger as Erling Solheim's Mother

Mark Noble as John Skinner Wilson

Ingvild Holthe Bygdnes as Woman in Langaards gate

Michael Shelford as MI5 Agent 1

Dominic Sullivan as MI5 Agent 2

Max Wrottesley as MI5 Officer

Erik Madsen as Erwin Morio

Kristian Halken as King Haakon VII

Petter Width Kristiansen as Crown Prince Olav

Hanne Gjerstad Henrichsen as Woman in Akers gata

Luka Horvat as School Boy

Pål Christian Eggen as Hans Konrad Andersen

Aavald Kaasa as Rjukan VGS Teacher 1

Tarald Brautaset Hagen as Rjukan VGS Teacher 2

Silje Øksland Krohne as Rjukan VGS Teacher 3

Jarl Flaaten Bjørk as Marthinsen's Chauffeur

Aidas Ašmonas as Per Solnørdal

Klara Bloma Mohn as Marthinsen's Housekeeper

Joakim Wagner-Larsen as Olav Selvaag

Vincas Alesius as German Soldier 1

Michael Ladek as German Soldier 2

Paulius Ignatavičius as German Soldier 3

Joakim Gunby as Confused Man