Even though Christian Grey is pretty comfortable with pain and crazy things, Charlie Hunnam isn't. The star actually hired extra security guards to keep overboard and angry 'Fifty Shades of Grey' fans at bay.

According to The Hollywood Reporter, Fans of the book have been swarming Hunnam's 'Sons of Anarchy' set with the S&M tome in hand. As a result, 'Fifty Shades of Grey' studio Universal actually paid for more bodyguards for Hunnam when he attended the FX premiere of 'Sons of Anarchy' on Sept. 7.

It's unclear what these infuriated mommy-porn readers want or expect to happen when they're there, because, well, their petitions have consistently failed to replace the British hunk.

Filming has yet to begin on the erotic tale. Here's hoping Hunnam stays safe when it does ... and that fans will actually see the movie before storming the studio with torches.

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