Judges John Torode and Gregg Wallace have set finalists Dick Strawbridge, Lisa Faulkner and Christine Hamilton three days of tasks ahead of crowning the winner on Friday.
On the first show on Wednesday, the trio will be given a masterclass in sauces from Torode before travelling to France where they will be asked to cook for dancers at the Moulin Rouge and cater a Chateau dinner for the Champagne masters of France.
In the second episode of challenges, the finalists will be asked to create a fine dining menu for travelers on the Orient Express and serve a three-course Michelin standard meal for five top chefs at the L'autre Pied.
On Friday's final episode, the trio will return to the MasterChef kitchen, where they will have one final chance to impress Wallace and Torode with a three-course meal.
Former Celebrity MasterChef winners have included Nadia Sawalha, Matt Dawson, Liz McClarnon and Jayne Middlemiss.
The Celebrity MasterChef final starts on Wednesday at 8pm on BBC One.