"He's become the focus of a group of over-zealous female fans," Contactmusic quoted a source as telling the Daily Star. "Robert is constantly inundated with fan mail but one group of four girls have been targeting him repeatedly, telling him they want to do ruse, saucy things to him. One girl from Japan has started turning up wherever he is."
"Robert thinks there's only one thing for it and that is to increase his security and use a body double. It may seem a bit extreme but at least he can now be in two countries at once and spend some quality time with Kristen," the source added.
Robert has previously admitted to having 25 security guards to protect him when he was shooting for his role as vampire Edward Cullen in the Twilight Saga movie franchise.