British actor Timothy Spall was left mortified after sleepwalking naked around the corridors of a hotel.

The Harry Potter star has previously suffered from somnambulism and he recalls one of his most embarrassing moments was waking up in a guest house in Cornwall, England and realising he had been wandering the public areas with no clothes on.

He tells British newspaper The Guardian, "I have had a tendency to sleepwalk in the past. I once woke up in the nude in a corridor of a hotel in Cornwall in the small hours of the morning. Oh, the cringing shame."