The three leads in the Harry Potter films.

A British actor who portrayed the werewolf Fenrir Greyback in three Harry Potter movies has died while hiking through California's Death Valley, celebrity website reported on Friday.

Dave Legeno, 50, was found dead by a pair of hikers in a remote area. Police said that he appeared to have died of heat-related causes in the notoriously hot desert region where temperatures at this time of year often reach 50C.

Police said there was no sign of foul play and that the official cause of death would be released following an autopsy.

Legeno, who apart from being an actor was also a professional Mixed Martial Arts Fighter, appeared in the final three Harry Potter movies. - Sapa-dpa