Jack Nicholson is joining Leonardo DiCaprio, Matt Damon and Mark Wahlberg in the Martin Scorsese-directed thriller "The Departed," Variety reports.

Nicholson will play an Irish gang boss in the film, which is based on the hit Hong Kong gangster movie "Infernal Affairs."

It centres on a gangster (Damon) who infiltrates the Boston police department, while an undercover cop (DiCaprio) tries to get inside the Irish-American mobsters.

"The Departed" is scheduled begin production in April.

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