Rourke added to Expendables
Several big names are already set to appear in the movie, with Forest Whitaker confirming earlier this week that he is to star as a CIA operative.
Others already on board include Jet Li, Dolph Lundgren, Jason Statham and Randy Couture.
According to Variety, Rourke will play an arms dealer in the film, which centres on a group of mercenaries who are trying to free South American people from a tyrannical dictator.
Stallone cast Rourke - who found fame in 1980s movies such as Angel Heart and 9 ½ Weeks - in his 2000 remake of Get Carter, which helped breathe new life into the fallen actor's career.
Meanwhile, Rourke is being tipped for a Golden Globe for his performance in Darren Aronofsky's new movie The Wrestler, about a ex-professional fighter who is trying to stage a comeback.
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