Millie Mackintosh poses in a plunging swimsuit as she dotes on baby Sienna in Santorini

She jetted off on her first holiday abroad with husband Hugo Taylor and baby Sienna as a family-of-three, earlier this week.

And on Friday, Millie Mackintosh showcased her sensational post-baby body in a plunging white swimsuit as she enjoyed breakfast with a view from her five-star hotel Andronis Luxury Suites in Santorini, Greece.

Documenting their adventures on Instagram, the Made In Chelsea star, 31, who welcomed her daughter two months ago, also shared a cute seaside snap of herself doting on little Sienna, on Thursday.

Hot mama! on Friday, Millie Mackintosh, 31, showcased her sensational post-baby body in a plunging white swimsuit as she enjoyed breakfast with a view in Santorini, Greece

The the first-time mum put on a busty display as she posed for a gorgeous shot while enjoying breakfast of coffee and croissants in her swimsuit. 

Millie looked as radiant as ever in her swimwear, which boasted a coordinating belt with a gold buckle, which served to highlight her trim waist. 

She wrote alongside: ‘Kalimera’ which means ‘Good Morning’ in Greek. 

A day earlier, Millie captioned the adorable photograph of herself and Sienna wearing pretty frocks: ‘First family holiday making lifelong memories.

‘This magical mother and daughter moment captured by @hugotaylorlondon in our favourite outfits #millieXpitusa @pitusa.co will be one to remember #sunsettavern #santorini #ad.’

Cute! The Made In Chelsea star, 31, who welcomed her daughter two months ago, also shared a cute seaside snap of herself doting on little Sienna, on Thursday

Cute! The Made In Chelsea star, 31, who welcomed her daughter two months ago, also shared a cute seaside snap of herself doting on little Sienna, on Thursday

Glorious: Millie also took to her Instagram Stories where she showed off her billowing white midi dress in all its glory, while holding Sienna to her chest

Glorious: Millie also took to her Instagram Stories where she showed off her billowing white midi dress in all its glory, while holding Sienna to her chest

Millie also took to her Instagram Stories where she showed off her billowing white midi dress in all its glory, while holding Sienna to her chest. 

After posting her jaw-dropping swimsuit snap, the reality star then layered up with a gorgeous blue maxi dress to take Sienna for a stroll in her pushchair. 

She also poked fun at her husband Hugo Taylor, as he jokingly posed while they ate lunch, for a photograph she captioned: ‘Insta dad @hugotaylorlondon.’  

Sunshine strolls: After posting her jaw-dropping swimsuit snap, the reality star then layered up with a gorgeous blue maxi dress to take Sienna for a stroll in her pushchair

Sunshine strolls: After posting her jaw-dropping swimsuit snap, the reality star then layered up with a gorgeous blue maxi dress to take Sienna for a stroll in her pushchair

Insta dad: She also poked fun at her husband Hugo Taylor, as he jokingly posed while they ate lunch, for a photograph she captioned: 'Insta dad @hugotaylorlondon'

Insta dad: She also poked fun at her husband Hugo Taylor, as he jokingly posed while they ate lunch, for a photograph she captioned: ‘Insta dad @hugotaylorlondon’

On Tuesday, Millie uploaded a sweet snap of herself breastfeeding her daughter Sienna during her baby’s first flight. 

Proving safety comes first, she sported a protective face mask as she thanked British Airways staff for their help during their ‘smooth’ journey.

The media personality, who has been vocal about urging others to ‘normalise breastfeeding’, appeared in great spirits as she nursed her little one.   

Sharing her delight at her relaxing trip from London Heathrow Airport, the TV star said: ‘Our first experience @heathrow_airport with Sienna went really smoothly, everyone had masks on and kept their distance. 

‘Planning on feeding at take off and landing to help with her ears.’ (sic) 

At peace: On Tuesday, Millie uploaded a sweet snap of herself breastfeeding her daughter Sienna during her baby's first flight

At peace: On Tuesday, Millie uploaded a sweet snap of herself breastfeeding her daughter Sienna during her baby’s first flight

On 4 July, travel advice in the UK changed, with exemptions for going on holiday to certain countries and territories that no longer pose a high risk for British travellers.  

Earlier this month, the socialite said she is coming to terms with the physical changes to her body since giving birth. 

Speaking to Glamour, she insisted the contrast between her pre and post pregnancy appearance is akin to looking at two completely different people. 

‘I’ve started walking every day, I’ve started doing a bit of strength training again and it’s nice to feel like I’m just getting stronger,’ Millie said of her post-partum exercise routine.   

‘I just don’t like the term, ‘getting my body back,’ because I think it’s a new body, it’s different, you’ve given birth. So, it’s not your old body anymore.’   

Honest: Earlier this month, the blonde beauty said she is coming to terms with the physical changes to her body since giving birth

Honest: Earlier this month, the blonde beauty said she is coming to terms with the physical changes to her body since giving birth