Robert De Niro and former James Bond director Martin Campbell have fallen out over "creative differences".The actor has quit Campbell's Edge of Darkness, less than a month into shooting and just days after arriving on the set in Massachusetts.A spokesman for De Niro says, "Sometimes things don't work out; it's called creative differences."The movie legend was slated to play a clean-up agent opposite Mel Gibson in the drama, which is a revamp of a 1980s TV miniseries Campbell directed for the BBC.The filmmaker is now hunting for a replacement for De Niro.

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