Fit to burst! Michelle Bridges displays her VERY large bump in black bralet as she prepares for the arrival of first baby with Steve 'Commando' Willis

She's due to give birth to her first child any day now.

And on Saturday Michelle Bridges looked fit to burst as she showed off her swollen bump in an Instagram post. 

Posing in a crop-top and leggings, the 45-year-old smiled for the camera as she cosied up to her pet dog. 

Ready when you are! Michelle Bridges showed off her enormous bump as she posed for an Instagram photograph on Saturday 

Sharing the photograph online, she captioned the picture: 'Are you ready to go for a walk? Are you ready to be an uncle?'

On Sunday the fitness guru put on a more glamorous display, wowing in a colourful top with her hair coiffed to appear in another image after receiving a gift ahead of her new arrival. 

The fitness enthusiast posed with a barbell made of nappies which had been sent to her as a gift by a fellow trainer. 

Captioning the photograph, Michelle said: 'Yup....It's a nappie bar bell!'

Suits her: The fitness fanatic was given a barbell of nappies as a gift ahead of her baby's birth 

They were the latest in a string of selfies shared this week as the reality TV star prepares to become a mother for the first time.  

Earlier she excitedly took to Instagram after successfully putting together a cot for her newborn. 

'We did it! A bit of guns and roses music and it flew by! Love my @stokkebaby crib...über cool,' she wrote.  

Baby on board: Michelle Bridges showed off her baby bump as she posted a picture of a crib to Instagram on Thursday

Ahead of the finished product, Michelle uploaded a snap of the parts of the bed writing: 'How hard can it be right....?

Michelle, whose team won The Biggest Loser Families last week, has been keeping herself occupied as she awaits her baby.

The fitness fanatic and Steve were seen enjoying a day at Tamarama beach in Sydney recently.  

While there Michelle showed off her heavily pregnant shape in a printed bikini as cooled off in the ocean. 

Baby on board: The 45-year-old trainer was recently pictured enjoying a day in the sunshine at Tamarama beach with her partner Steve 'Commando' Willis 

The before picture: Michelle posted a snap of the parts of the crib before she managed to put it together

Speaking to NOVA this week, Steve revealed they couple are ready to go to the maternity ward at any moment as they keenly expect their bundle of joy.

'It's pretty close. It could be any day now. So I've got to really stay within the vicinity of Sydney,' he said.

The new addition will be Commando's fourth as he has two children, Ella, six, and Jack, three, who he shares with his ex Froso, and older daughter Brianna, 17, from a previous relationship. 

Keeping her fans informed: Michelle has posted lots of pictures as her body has changed throughout her pregnancy 

Working out: The Biggest Loser trainer has not let being pregnant get in the way of her exercise routine

Michelle has previously come under fire for maintaining a strict exercise regime throughout her pregnancy.

She has regularly been sharing and demonstrating her personal workout tips on social media but has been sure to insist that she takes adequate breaks and doesn't push herself too far.

The fitness fanatic defended her choices on 2DayFM where she argued that expecting a baby is 'all the more reason' to workout.