London, March 5 : Harry Potter star Daniel Radcliffe is being guarded by four former SAS bodyguards after the actor received a death threat from a stalker.
Anxious movie bosses have asked the minders to assign security to the 18-year-old actor.
According to sources, Radcliffe changed cars thrice on March 2, during filming of the seventh and final Potter movie The Deathly Hallows.
The actor's regular driver, who has been with Radcliffe for the past seven years and is considered "part of the family," has been pulled out for the time being.
Insiders say that the nature and details of the threat, received through Warner Bros, is unclear.
However, a security source revealed that bosses are taking the threat seriously and ordered his protection at all times on set and to and from shoots.
"There is a real concern for Daniel's welfare. The bigwigs haven't said what has been going on. It's all hush-hush - but security has been massively ramped up," The Sun quoted the source, as saying.
The source added that the protection is similar to that given to Princes William and Harry when they are not on military duty.
The actor has also been provided with a "chase car" which follows the vehicle in which he is travelling in case of emergency.
Talking about the SAS guards, the source said: "They are all experts in evasive driving, threat assessment and close protection. This isn't about keeping an eye out for the paparazzi - these guys are looking for something far more sinister."
"Daniel has the four guards with him at all times, as well as a new driver. When he travels they use dummy cars and swap vehicles," the source added.