Daniel RadcliffeHarry Potter star Daniel Radcliffe is reportedly being guarded by four former SAS bodyguards after receiving a death threat.

The message is said to have arrived last week via Warner Bros, the studio behind the blockbuster film series, and is being taken very seriously.

An inside source told the Sun: “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.”

Daniel’s regular driver, who has worked with the young actor for seven years, has been temporarily stood down in favour of a more specialist driver and a “chase car” has also been introduced, which follows his main car in case of an emergency. The source explained: “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 18 year old actor is currently filming the sixth film in the series, Harry Potter and the Half-Blood Prince around London and Surrey.