Sienna Miller enjoyed the surf during her recent holiday in Costa Rica, looking incredible in a skimpy bikini.
The actress, 42, has been holidaying in Central America with her boyfriend Oli Green, 27, three months after welcoming their first child together.
Sienna, who is also mother to her daughter Marlowe, 10, stripped down to a tiny black bikini for her surf session.
With her blonde locks swept back off her face, the beauty flashed a big smile as she rode a wave on her boogir board.
The star looked in great spirits during the action-packed beach day as she enjoyed some child-free time with her friends.
Sienna Miller enjoyed the surf during her recent holiday in Costa Rica, looking incredible in a skimpy bikini
The actress, 42, has been holidaying in Central America with her boyfriend Oli Green, 27, three months after welcoming their first child together
It was announced in January that Sienna and Oli had welcomed a baby girl - whose name is not known - almost two years after they were first romantically linked.
Sienna's pregnancy was revealed during a beach holiday in August where she stepped out sporting a bump.
Weeks before the birth Sienna covered Vogue as she spoke for the first time about her pregnancy and revealed she was having a girl.
In incredible photos taken to accompany the interview she displayed her bare bump alongside both Marlowe and boyfriend Oli.
Sienna spoke candidly about her pregnancy and how it had been 'unplanned', but admitted she feels 'more psychologically prepared' than with her first born.
During the rare interview, Sienna said that Marlowe has been angling for a sibling for some time. Sienna shares Marlowe with her ex-boyfriend Tom Sturridge.
Sienna also said she'd been fighting her own prejudices about being an older mother and has to learn to stop making a joke out of it.
She told the publication: 'I'd love to get to a point where I didn't feel the need to make a joke of my being older and having a baby, to show I'm in on the joke.'
Sienna, who is also mother to her daughter Marlowe, 10, stripped down to a tiny black bikini for her surf session
The star looked in great spirits during the action-packed beach day as she enjoyed some child-free time with her friends
It was announced in January that Sienna and Oli had welcomed a baby girl - whose name is not known - almost two years after they were first romantically linked
And in a video she filmed with Vogue, Sienna revealed that the pregnancy was an unplanned one.
She revealed: 'I was very fortunate. I wasn't necessarily trying to get pregnant. This happened as a total surprise and biologically was something I was able to do.'
Sienna went on to further address the stigma around pregnancy as an older woman as she has fought her own prejudices around the subject.
Sienna's pregnancy was revealed during a beach holiday in August where she stepped out sporting a bump
Weeks before the birth Sienna covered Vogue as she spoke for the first time about her pregnancy and revealed she was having a girl
Sienna spoke candidly about her pregnancy and how it had been 'unplanned', but admitted she feels 'more psychologically prepared' than with her first born
During the rare interview, Sienna said that Marlowe has been angling for a sibling for some time. Sienna shares Marlowe with her ex-boyfriend Tom Sturridge
She added: 'I think people are comfortable with a way of living that has existed for many years, which is very misogynistic and patriarchal.
'Like me being the older woman in a partnership with a younger person or being pregnant over 40 and that that's irresponsible and poor child and it's such double standards.'
On what is different this time around, she said: 'I have expectations where I had none before. I feel much more psychologically prepared than I was with Marlowe.
Sienna also said she'd been fighting her own prejudices about being an older mother and has to learn to stop making a joke out of it
She told the publication: 'I'd love to get to a point where I didn't feel the need to make a joke of my being older and having a baby, to show I'm in on the joke'
On what is different this time around, she said: 'I have expectations where I had none before. I feel much more psychologically prepared than I was with Marloww'
The actress previously admitted to freezing her eggs after turning 40 because she feared the prospect of having no more children
She told ELLE: 'Biology is incredibly cruel on women in that decade – that's the headline, or it certainly was for me
'Then I got to 40 and I froze some eggs. Having been really focused on the need to have another baby, I'm just like, if it happens, it happens'
'It was quite a shock, the reality. I hadn't given it the thought, I guess you can't prepare for it. In my mind I imagine it's going to be the loveliest, but I think I've forgotten.'
The actress previously admitted to freezing her eggs after turning 40 because she feared the prospect of having no more children.
She told ELLE: 'Biology is incredibly cruel on women in that decade – that's the headline, or it certainly was for me.
'Then I got to 40 and I froze some eggs. Having been really focused on the need to have another baby, I'm just like, if it happens, it happens. That kind of existential threat has dissipated.'
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