K.O. Movie Netflix: Trailer, Cast, Plot - Netflix Tudum

  • Deep Dive

    Everything You Need to Know About K.O.

    The French action film stars real MMA fighter Ciryl Gane.

    By Ingrid Ostby
    June 6, 2025

A former MMA champion haunted by the outcome of his final fight teams up with a police officer looking to avenge her brother’s death by mobsters in hopes of rescuing a troubled teen from the clutches of Marseille’s crime overlord. Starring MMA fighter and actor Ciryl Gane, as well as Alice Belaïdi, and Anne Azoulay, the action movie K.O. was written and directed by Antoine Blossier (Remi, Nobody’s Boy; Prey). 

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When will K.O. be released?

Stream it now.

A man wearing camouflage talks on the phone as a man in all black stands behind him looking on.
Xavier Baler

Where can I find the trailer for K.O.?

Check it out at the top of this page. 

Two men fight in a nightclub
Laurent le Crabe

Who’s in the cast of K.O.?

  • Ciryl Gane (Den of Thieves 2: Pantera) as Bastien, a former MMA champion who works in a salt mine
  • Anne Azoulay (Black Box) as Emma, the wife of Bastien’s one-time opponent Enzo
  • Alice Belaïdi (If I Were a Boy) as Kenza Alaoui, a police captain
  • Maleaume Paquin (Remi, Nobody’s Boy) as Léo, Emma’s son
  • Foued Nabba (Blood Coast) as Abdel Manchour, the boss of the Manchour crime family
  • Samuel Jouy (Ganglands) as Commissaire Daniel Canistra, Kenza’s boss
  • Virgile Bramly (Nice Girls) as Capitaine Vasseur, Kenza’s colleague
  • Malone Ettori (Candice Renoir) as Capitaine Benoît Sarkissian, Kenza’s colleague
Ciryl Gane as Bastien and Anne Azoulay as Emma

What happens in K.O.?

A prolific MMA fighter, Bastien’s (Gane) final match ends when he accidentally lands a fatal blow on his opponent, Enzo. The moment is witnessed by Enzo’s wife, Emma (Azoulay), and their son, Léo (Paquin). Since then, Bastien’s called it quits on his MMA career, instead becoming a recluse who works in a salt mine. Meanwhile, young Léo’s struggle with grief has taken him down a dark path. So when he goes missing, Emma reluctantly brings Bastien back into the fold to help find him. Bastien’s determination leads him to combine forces with police chief Kenza (Belaïdi), who’s determined to find justice after Marseilles’ most violent gang murdered her brother.   

Where does K.O. take place?

The film takes place in Marseilles, France. 

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