Harking back to Marks and Spencer's (M&S) food porn days, this isn't just any Christmas ad, this is an M&S Christmas Food ad, where the viewer is left a dribbling mess.Pushing its Christmas range ahead of its critical sales period, M&S has teamed up with nine beloved celebs: Olivia Coleman, Chiwetel Ejiofor, Eddie Redmayne, Gillian Anderson, Dame Helen Mirren, Jeremy Irons, Dame Julie Walters, Naomie Harris, and Tom Hardy, who will each voice a different food porn ad.Created by Grey London, M&S will release one ad per week on the run-up to the Christmas period. Like John Lewis, M&S has put charity fundraising at the heart of its campaign, pledging two million pounds to charities handpicked by the nine celebs.The first spot, which goes live today (6 November), is voice by Coleman and sees the Oscar-winner smoothly talk the viewer through M&S' glittering 'Light Globe Gin Liqueur', its tantalising chocolate panettone, its collection of mini beef and porcini Yorkshire puds and its sliced smoked salmon. Her choice of charities are Anthony Nolan, Back Up, and Tender Education & Arts.