By Daily Mail Australia Reporter
Published: 23:16 GMT, 25 March 2019 | Updated: 23:16 GMT, 25 March 2019
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He's currently in an on-screen relationship with Heidi Latcham on Married At First Sight.
But away from the cameras, Mike Gunner is dating Casey Stewart - the eldest daughter of The World's Hottest Grandma, Gina Stewart.
On Monday, Casey, 26, revealed one of the reasons why Mike, 44, has fallen so hard for her by stripping down to a burgundy skimpy bikini on Instagram.
Does Mike like? Casey Stewart, who is dating Married At First Sight's Mike Gunner, flaunted her incredible bikini body on Instagram this week
Showing that she's learned a thing or two from her model mother, the Gold Coast stunner struck a sexy pose and flaunted her busty assets in the two-piece.
Mike and Casey's shock romance was revealed by Woman's Day on Monday.
'Mike and Casey have been spending a lot of time together and she stays at his place on the Gold Coast a lot,' a source said.
