A packed programme of events and entertainments running from 6 p.m. until 8 p.m., with the big light switch-on at 7 p.m.
In the Town Hall, there will be 14 different groups with fundraising stalls; in the smaller Memorial Hall, teas and coffees, with mincemeat pies and shortbread, will be served.
A number of businesses will be staying open late and will offer special offers and discounts, including Cullen Ice Cream, Cullen Pharmacy, Cullen Post Office shop, Patch of Blue and the Cullen Deli.
Pupils from Cullen Primary School will provide entertainment in the Town Hall after the switch-on, and 6 lucky pupils have been chosen to help switch the lights on.
The Cullen Fire Engine will also be in attendance, giving kids the chance to climb on board.
Santa will be there to meet the children and hand out goodies.