Um. We've finally figured out where we've seen Billy from Married At First Sight before.

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Well, well, well.

It seems Sam and Dino aren’t the only Married At First Sight contestants with just a lil bit of acting experience…

You see, since joining the show as an intruder alongside his ‘wife’ Susie, Billy has looked strangely familiar.

And now, we finally know why.

It turns out the barista and personal trainer actually previously appeared in a television advertisement for McDonald’s.

In the resurfaced commercial, which originally aired in 2012, the 28-year-old played a surfer struggling to pay for a meal at the fast food restaurant.

Check out Billy’s McDonald’s commercial here. Post continues below…

To make matters even more bizarre, Billy’s wife on the show, Susie, has also done some minor acting work.

As pointed out by the Daily Mail, the 25-year-old appeared in an advertisement for Queensland fitness company Peptides Direct earlier this year.

On last night's episode of Married At First Sight, Billy also admitted that he has posed naked for calendars in the past.

In recent years, Billy and his photographer John Bortolin have shared a number of shots from the, erm, racy Manscapes calendars.

Read more: We found Billy from Married At First Sight's nude calendar. You can thank us later.

Unsurprisingly, Billy and Susie aren't the only contestants on the show with a past in acting or TV.

Dino, who left the show during Sunday's night commitment ceremony, previously appeared on reality dating show First Dates Australia.

Dino also appeared in a razor brand commercial as well as a photoshoot for prescription glasses company Speqs alongside fellow MAFS contestant Jessika.

Sam also has a past in acting. He appeared in Home and Away  as a river boy last year and he also made a number of small appearances in Netflix crime series Secret City.

Bronson also had a past in reality TV appearing on Australian Ninja Warrior.