The pair appears together in the new thriller which tells the story of a diving instructor who returns to deep waters after a near-fatal encounter with a shark.
Berry and Martinez sparked rumours of an on-set romance while they were filming in South Africa and have since been spotted together after the shoot wrapped.
Speculation about how the actor came to land the role opposite the Oscar-winner later surfaced, but Berry's rep is adamant rumours of favouritism are definitely not true.
The spokesperson tells New York Post gossip column Page Six, "Olivier was cast because he was the best actor for the role and both Halle and the director agreed. Any speculation beyond that reason is completely false."