MEL'S EXPERT OPINION WHO'LL STAY TOGETHER?

There have been a lot of ups and downs for the couples on Married At First Sight, but as they head into the final vows, relationships expert Mel Schilling is quietly confident she knows which pairings will last the test of time in the real world.

And one of those duos is Olivia Frazer and Jackson Lonie. "They were a strong couple from the moment they laid eyes on each other," Mel, 50, tells Woman's Day. "It was great to see them work as a team."

However, she adds that Olivia's self-confessed tendency to hold petty grudges could cause issues for the pair down the line unless they have some very frank and honest conversations.

On the other hand, Mel says the drama only strengthened Domenica Colarco's relationship with her groom Jack Millar. "What a team!" she grins. "We saw Dom and Jack supporting each other, and remaining steadfast in their loyalty to each other throughout the experiment.