Hundreds of runners are swapping their shorts and vests for beards and red cloaks for an event in honour of Father Christmas.
Festive impersonators will jog or walk through Plymouth city centre for Santa's Fun Run, on Sunday, December 9.
Organisers are hoping to get 1,000 people to complete the 2.5k or 4k course in the third annual event. About 700 Santas took part last year.
The Rotary Club of Saltram has chosen Diabetes UK, Dame Hannah Rogers School and CHICKS, as charities to support this year. CHICKS provides country holidays for inner city children.
Entry donations are £10 for adults and £6 for children aged between six and 16. Everyone will receive a free Santa Claus costume, a finisher's medal, a mince pie and a drink.
The main route is approximately 4km long and starts at the top of Cornwall Street, between Drake Circus and the Central Hall and follows a course through the centre of Plymouth. The runs start at 11am. Enter at www.plymouthsantafunrun.co.uk.