Emma Watson was the target of a kidnapping plot on the set of her new movie. Two studio workers reportedly planned to kidnap or rob the 'Harry Potter' actress but had their plan foiled by a taxi driver who overheard them plotting the crime. He told his bosses who alerted Shepperton Studios near London and security was then stepped up on Friday with a guard posted outside of the 25-year-old star's trailer on the set of the live-action reboot of 'Beauty and the Beast'. A source told The Sun newspaper: "There was concern about her safety. The taxi staff reported what had been overheard after a night shoot. "They said the two studio staff travelling in the cab were chatting in a foreign language, unaware that the driver could understand every word. "It is shocking to think anyone would want to rob or harm Emma, particularly a member of studio staff."