In their latest mission, the two men must keep Deckard's younger sister, Hattie (Vanessa Kirby), away from the Hobbs & Shaw in order to achieve this goal. One person who agrees to help them is a character played by Kevin Hart, who appears in a cameo for the movie.

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Hart plays Federal Air Marshal Dinkley, who appears about halfway through Hobbs & Shaw. He first shows up while Hobbs, Deckard, and Hattie are on a plane to Moscow, inserting himself during a heated exchange of insults between the two men. Dinkley tries to cool them down before correctly guessing they're on a special mission. Throughout his conversation with Hobbs and Shaw, Dinkley repeatedly offers to be a part of the team. He also mentions he still has connections to vehicles and weapons from his time in the U.S. military and can get Hobbs and Shaw access to anything they might need. Dinkley later checks in with them to make sure they made it safely to Samoa in a plane that he procured for them.

There's no doubt that Hart's Hobbs & Shaw role happened because of his pre-existing working relationship with Johnson. The actors have appeared in two feature films together - 2016's Jumanji: The Next Level. Hobbs & Shaw director David Leitch provided some additional information on Hart's cameo, telling Collider that it "was an easy call to make" because of his and Johnson's connection, plus the inclusion of the Dinkley character sprang from the need to have "a Leo Getz-type character" help move the plot along.