The new season is said to be in the final stages of filming, and like with most reality shows - the stars tend to lean on previous cast mates.
But Married At First Sight bosses want to nip this tradition in the bud.
An insider told the Daily Mail, contestants are to "keep clear of the cast from previous years".
"The new cast have had it drilled into them that the previous stars are all desperate to stay famous and will be reaching out to them."
"As far as everyone involved in the show is concerned they're old news and don't want them creating any distractions from the new series and hijacking it."
Apparently last year's batch which featured stars like Tracey Jewel, Sara Roza and Nasser Sultan were also given a similar spiel.