Matthias Schoenaerts as Mikhail Averin

Léa Seydoux as Tanya Averina

Peter Simonischek as Admiral Vyacheslav Grudzinsky

Max von Sydow as Admiral Vladimir Petrenko

August Diehl as Anton Markov

Colin Firth as Commodore David Russell

Bjarne Henriksen as Russian Rescue Ship Captain

Magnus Millang as Oleg Lebedev

Artemiy Spiridonov as Misha Averin

Joel Basman as Leo

Pit Bukowski as Maxim

Matthias Schweighöfer as Pavel Sonin

Tom Hudson as Roman

Chris Pascal as Niko

Kristof Coenen as Sasha

Pernilla August as Oksana

Helene Reingaard Neumann as Vera

Martin Brambach as Kursk Captain Gennady Shirokov

Peter Plaugborg as Kursk Executive Officer Alexander Grekov

Guillaume Kerbusch as Torpedo's Room Midshipman Alexi Zhukov

Koen De Sutter as Admiral Ivakin (Peter the Great)

Gustaf Hammarsten as Lesser Admiral Mikhail Denisov (Peter the Great)

Aske Bang as Lt. Pulsky (Peter the Great)

Lars Brygmann as Priz Pilot Kasyenenko

Martin Greis-Rosenthal as Priz Pilot Ilyushin

Steven Waddington as Graham Mann (Seaway Eagle)

John Hollingworth as Lt. Bruce Hamil

Katrine Greis-Rosenthal as Daria Sonin

Josse De Pauw as Vadim Markov, Anton's Father

Feđa Štukan as Warehouse Worker Goncharov

Jehon Gorani as Warehouse Worker Oblomov

Miglen Mirtchev as Russian Captain Ivan Timoshenko

Mark Irons as Russian Head of the SVR Vladimir Laskutin

Zlatko Burić as Kulkin, Veteran Swimmer on Rudnitsky

Eva van der Gucht as Marina Lebedev

Geoffrey Newland as Rescue Team Diver Tony Scott

Danny van Meenen as Rescue Team Diver Paal Dinessen

Guido De Craene as Captain Calpin (Peter the Great)

Marjan De Schutter as Anastasia Dudko

Gabriela Cotet as Wife Daycare #1

Olga Markina as Wife Daycare #2

David Russell as Old Sailor New