PICTURE EXCLUSIVE: Pregnant Tamsin Egerton shows off her blooming bump in a tight t-shirt and denim shirt as she gets cosy with boyfriend Josh Hartnett in the park

She layered a loose denim shirt over a grey t-shirt which stretched across her bump, adding a pair of black leggings.

Comfy flat sandals and shades kept the pregnant beauty cool in the warm spring weather, while her blonde locks were styled into natural curls.

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Exciting time: The besotted couple cuddled up as Brit beauty Tamsin showed off her impressive yoga skills on the grass and enjoyed the sunshine 

Josh matched his girlfriend in his own casual ensemble, sporting black jeans and a white t-shirt with a baseball cap.

Tamsin demonstrated that she's keeping in shape during her pregnancy, dancing around, before at one point settling down on the grass for a couple of stretches. 

The couple have not publicly confirmed their exciting news - but the actress was overheard discussing her 'pregnancy diet' at the Vanity Fair Oscars after-party in February.

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Still got it! Tamsin looked gorgeous in her casual outing, which showed off her blossoming bump, and also demonstrated her impressive flexibility 

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Looking great: The actress layered a loose denim shirt over a grey t-shirt which stretched across her bump, adding a pair of black leggings

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Hollywood hunk: Josh matched his girlfriend in his own casual ensemble, sporting black jeans and a white t-shirt with a baseball cap

The pair, who have been together for four years, announced they had welcomed their first child, a daughter, in December 2015.

Last year, Josh spoke about how much he loves being a parent, as announced on the Live! With Kelly and Michael show last year that it had put 'everything into perspective'.

He said: 'I mean, your ego melts away when you have a new kid.'

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Not long to go! The couple have not publicly confirmed their exciting news - but the actress was overheard discussing her 'pregnancy diet' at the Vanity Fair Oscars after-party in February

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And chill! Josh patiently waited as Tamsin stretched out on the grass

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Simply gorgeous: The blonde beauty showed off her natural beauty with minimal makeup 

'Your heart kind of leaves your body and you give it permission to walk around with someone else for a while.

'It’s really terrifying but it’s beautiful. I love it more than anything. I wish I would have started it earlier. But I’m so glad that she is the one I’m raising.'

After admitting that he's been very tired of late, Josh gushed: 'The best moments are when you have those individual moments alone in the middle of the night.' 

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Family of four: Josh and Tamsin, who have been together for four years, announced they had welcomed their first child, a daughter, in December 2015

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Family man: Last year, Josh spoke about how much he loves being a parent, as announced on the Live! With Kelly and Michael show last year that it had put 'everything into perspective'