The 26-year-old WAG, who is expecting her first child with Jamie O'Hara later this year, has already filmed her appearance on the BBC One cookery show.
5 Live DJ Mark Chapman, TV presenter and I'm A Celebrity... star Jennie Bond, actress Tricia Penrose and former Strictly Come Dancing finalist Colin Jackson are also in the competition.
Former Dragons' Den panellist Richard Farleigh, actors Alex Fletcher, Lisa Faulkner, Mark Little and Neil Stuke, TV star Jenny Powell, athletes Tessa Sanderson and Dean Macey, Radio 1 DJ Nihal Arthanayake and reality TV star Christine Hamilton will compete for the title.
"This year the series steps up a notch. Never before has MasterChef seen such terrible and such brilliant food on the same series!" said series executive editor Karen Ross.
Celebrity MasterChef, which will be judged by show regulars John Torode and Gregg Wallace, will return for a fifth series later this year.