The announcement – revealed on ITV's Loose Women where Lynda was a presenter - comes after the mum-of-two revealed her wish to spend one last Christmas with her family.
She died on October 19.
Lynda wanted to spend her Christmas day in a hotel eating a full turkey dinner, before returning home to her family for pudding and presents.
On what was her latest television interview on Loose Women, Lynda explained: "Well I've succumbed to not cooking (Christmas dinner). I thought poor (husband) Michael, you can't put him through that again.
"So we're going to go to the hotel and have the meal but just for a little bit of control we're going to open home for pudding and presents."
Sadly Lynda never made it to Christmas day after she lost her battle with colon cancer last month.
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But thanks to a campaigner, Lynda will get her Christmas wish as she shares the day with the whole of the UK, in the form of her classic 1984 Christmas ad.
Beverley Hardwick, a driving instructor, has been helping to organise the commercial's showing after being moved by the actress's death.
She revealed she also had a family member suffering from the illness, and Lynda's wish to spend one last Christmas with her family had 'struck a chord'.
The advert will be shown on ITV 'during the commercial break of a major primetime show' in a tribute to Lynda.
Premier Foods, which owns the Oxo brand, said: "The My Christmas Oxo advert from 1984, starring much-loved actress Lynda Bellingham, will be re-screened on Christmas Day in memory of her life and career.
"Over the past few weeks, hundreds of thousands of Lynda's fans have rallied behind a call for the return of the ad as a fitting tribute for all the inspiring things she achieved during her career.
"To honour the sad loss of such a fabulous actress, organisations and individuals involved in the creation and production of this initiative have given freely of their time.
"Premier Foods will make a donation to Action Against Cancer, one of the charities supported by Lynda, in line with the wishes of her family."