Petra Ecclestone shows off her slim figure just WEEKS after giving birth to a baby girl

They welcomed their first child together in March.

And on Sunday, Petra Ecclestone, 31, showed off her incredibly slim figure just weeks after giving birth to a baby girl, as she soaked up the sunshine with fiancé Sam Palmer, 36, in the grounds of their London mansion amid the COVID-19 lockdown.

Taking to Instagram to share photos of her day, the mother-of-four flashed her toned midriff as she showcased her post-baby body in a pink T-shirt and joggers.

Petra looked relaxed as she lay back on an outdoor couch, in a couples’ selfie taken by her new fiancé Sam, a vintage car salesman from Essex, which he also shared to social media.  

The socialite shielded her eyes in statement white sunglasses as she chilled out in her T-shirt and mottled tracksuit bottoms.   

Petra scraped her blonde tresses up into a bun atop her head and was make-up free for her Sunday chill-out. 

While Petra’s post didn’t contain a caption, Sam wrote: ‘Week 6. Sun in shining and we are getting 5 minutes to ourselves.’ 

The Formula One heiress also took to her Instagram Stories where she shared a selfie taken in her children’s walk-in wardrobe.

She wrote beneath the shot: ‘At least I got out of my PJs today finally… as good as it’s going to get for now!’ 

Petra’s followers flooded her comments, with many asking how she looked so slim after giving birth just weeks ago.

‘How are you so skinny mini!? You look amazing!’ praised one fan, while another added: ‘How amazing does Petra look.’

Someone else commented: ‘Seriously!!!!! Didn’t you just give birth !!!!’ as another follower quizzed: ‘How have you just had a baby? you look great!’ 

The blonde beauty is already mother to three other children, Lavinia, seven, and twin boys James and Robert, both four, from her marriage to ex-husband James Stunt. 

Petra shared an update on her little one while in lockdown earlier this month, as she took to Instagram to answer fans questions.

The Formula One heiress gushed about her youngest child and said she was ‘in love with [her] angel.’

Petra also hinted that she had tied the knot with her recruitment consultant beau Sam when a fan asked if they were ‘still getting married’, to which she responded: ‘Maybe we already are.’

While she praised him as being a ‘great father, best friend, loyal, funny, and doesn’t give a s*** about money’, though she went on to joke that he was ‘opinionated and very bossy.’

Talking about her newborn girl, Petra gushed: ‘Loving every minute of it. Yes I am breastfeeding, she is definitely the most difficult one so far.’  

Petra said the three children which she shares with her ex ‘are obsessed’ with their new sibling, and  said in delight that they ‘love her and shower her with kisses all day.’  

Due to coronavirus, Petra has been unable to get home to Los Angeles from the UK, but has had to keep in touch with her sister Tamara via video-call. 

Although Petra is staying just a few miles away from Tamara, they have not been able to meet up in person.

Tamara recently said: ‘Petra is coping really well at home with four young kids – and is so sweet. We are calling each other 1,000 times a day! It’s lovely.’ 

This comes after Sam took to his Instagram Stories to announce their new arrival, revealing that they welcomed their child into the world last month. 

Recruitment consultant Sam’s message read: ‘I have received lots of messages asking when the baby is due. We had a beautiful daughter a few weeks ago. 

‘Thanks for all the messages. Mother and daughter are both very well. She is yet to see the world, but I’ve told her she will one day if she behaves.’ 

It appears that the announcement was spurred on by a selfie of the new parents, which was shared on Sam’s Instagram account hours earlier. 

The couple announced their engagement on New Year’s Eve 2018 – just over a year after her break-up with businessman James. 

Their divorce was finalised in October 2017, after six years of marriage.