The stars will put their cooking skills to the test during a four-week run this summer.
The actors taking part will be: Linda Robson, Louis Emerick, Wendi Peters, Debra Stephenson, Chris Parker, Joe McCann, Steven Pinder, Mark Moraghan, Vicki Michelle, Sean Wilson, Clare Grogan and Hywel Simons.
Joining them will be musicians Liz McLarnon, DJ Spoony and Claire Richards; sports personalities Denise Lewis and Noel Whelan; presenters Andi Peters, Andrew Castle, Michael Buerk, Kaye Adams, Julia Bradbury and Josie D’arby and comedian Ninia Benjamin.
Series editor Karen Ross said: "As viewers would have seen from last year’s series and from all the Masterchef programmes, this competition is really tough and the standard of some of this year’s cooking has been inspiring.
"All participants share a passion for food but cooking for a busy lunchtime service in top London restaurants is very different when you’re on the other side of it."