Mary Kalifatidis seen with seven-foot-tall security guard following stint on Big Brother

Married At First Sight star Martha Kalifatidis’ mother Mary is currently starring on the new series of Big Brother.

And it appears the 55-year-old Melbourne-based power mum is taking extreme safety precautions following her rise to fame.

Uploading a photo to her Instagram story on Sunday, Mary is seen posing with a tall  man dressed in black and white formal wear.

‘Wanted to introduce you all to my body guard cousin,’ Mary wrote.

The influencer-turned-reality star went on to tell her 60,800 followers that her new detail is one not to be messed with, and is seven foot tall. 

‘Sorry, were you talking to me? Ah, yep. I didn’t think so,’ she wrote alongside a laughing emoji.

In the photo, Mary is seen looking glamorous, all dressed up for what appeared to be a wedding.

It comes just days after Martha, 32-year-old decided to troll her mum relentlessly after she ‘got glam’ to do the housework amid her newfound reality TV fame. 

‘You’re so glam now you’re on Big Brother!’ Martha quipped to her mum in a video. ‘Do you wear makeup to vacuum? Oh my God, now that you’re a celeb!’

Martha then ran up to her mum, who furiously pointed the hoover at her daughter in rage.

‘F**k off, Martha!’ Mary bit back.

Indeed, Mary has caused quite the stir on Big Brother this season – only recently playing a hilarious prank on her housemates. 

Mary snuck in several hats with rude Greek sayings, and tricked a handful of her housemates into wearing them on television.