Sienna Miller, 40, flaunts her incredible figure in a black swimsuit

She’s currently enjoying a getaway in St. Tropez with her model beau Oli Green, 25.

And Sienna Miller, 40, looked incredible on Saturday as she donned a black swimsuit while showing off her taut physique during the trip.

Spending time at celeb favourite Hotel du Cap-Eden-Roc, the actress enjoyed a sunny day diving in and out of the clear blue water. 

Stunning: Sienna Miller , 40, looked incredible on Saturday as she donned a black swimsuit showing off her taut physique while in the south of France

She looked simply gorgeous in the flattering one piece which featured a scoop neck design, thin straps and a criss-cross low back.

While Sienna, who’s complexion appeared natural for the day, had her drenched blonde locks falling freely.

The New York native added a dainty silver anklet to the look, while keeping the rest of her accessories to a minimum.

Love: Spending time at celeb favourite Hotel du Cap-Eden-Roc with Oli, the actress enjoyed a sunny day diving in and out of the clear blue water

Love: Spending time at celeb favourite Hotel du Cap-Eden-Roc with Oli, the actress enjoyed a sunny day diving in and out of the clear blue water

Quality time together: She's currently enjoying a getaway in St. Tropez with her model beau Oli, 25

Beauty: She looked stunning on her holiday

Quality time together: She’s currently enjoying a getaway in St. Tropez with her model beau Oli, 25

Wow: She looked simply gorgeous in the flattering one piece which featured a scoop neck design, thin straps and a criss-cross low back

Wow: She looked simply gorgeous in the flattering one piece which featured a scoop neck design, thin straps and a criss-cross low back

She was snapped jumping in and out of a rock-surrounded area of sea, heading in full force from a metal stepladder. 

Meanwhile her boyfriend Oli mirrored her actions, as he went in for the kill while jumping in – donning a pair of light blue swimming trunks.

Drying off, Sienna wrapped a white towel from the hotel around her torso as she  took a stroll back on land.

Swim: She was snapped jumping in and out of a rock-surrounded area of sea, heading in full force from a metal stepladder

Swim: She was snapped jumping in and out of a rock-surrounded area of sea, heading in full force from a metal stepladder

Getaway: While Sienna, who's complexion appeared natural for the day, had her drenched blonde locks falling freely

Tan: She sported a natural bronzed glow

Getaway: While Sienna, who’s complexion appeared natural for the day, had her drenched blonde locks falling freely

The pair have been enjoying the sunny French getaway this week, appearing loved up as they take the time to kick back.

Sienna – who is 15 years Oli’s senior – first stepped out with the Burberry model back in February at a New York Knicks game, confirming their romance. 

Rising star Oli was the face of a Burberry 2018 campaign and has also modelled for high street retailer GAP. 

While he is also an actor, and is from one of the British art world’s most prestigious families – as his grandfather Richard Green owns two galleries in Mayfair.

Holiday: Drying off, Sienna wrapped a white towel from the hotel around her torso as she took a stroll back on land

Holiday: Drying off, Sienna wrapped a white towel from the hotel around her torso as she took a stroll back on land

Sporty: Meanwhile her boyfriend Oli mirrored her actions, as he went in for the kill while jumping in

Hunk: He donned a pair of light blue swimming trunks

Sporty: Meanwhile her boyfriend Oli mirrored her actions, as he went in for the kill while jumping in – donning a pair of light blue swimming trunks

Romantic: The pair have been enjoying the sunny French getaway this week, appearing loved up as they take the time to kick back

Romantic: The pair have been enjoying the sunny French getaway this week, appearing loved up as they take the time to kick back

Sweet: Sienna - who is 15 years Oli's senior - first stepped out with the Burberry model back in February at a New York Knicks game, confirming their romance

Sweet: Sienna – who is 15 years Oli’s senior – first stepped out with the Burberry model back in February at a New York Knicks game, confirming their romance

Star: Rising star Oli was the face of a Burberry 2018 campaign and has also modelled for high street retailer GAP

Star: Rising star Oli was the face of a Burberry 2018 campaign and has also modelled for high street retailer GAP

In good spirits: Sienna couldn't wipe the smile off her face as she enjoyed the luxury holiday with her handsome beau

Swimming: She later dried off on land

In good spirits: Sienna couldn’t wipe the smile off her face as she enjoyed the luxury holiday with her handsome beau

Natural: The New York native added a dainty silver anklet to the look, while keeping the rest of her accessories to a minimum

Natural: The New York native added a dainty silver anklet to the look, while keeping the rest of her accessories to a minimum

Refreshing: She cooled off in the ocean

Drying off: She wrung out her hair to dry it off after her refreshing dip in the sea with handsome beau Oli

Drying off: She wrung out her hair to dry it off after her refreshing dip in the sea with handsome beau Oli

Glorious: She was topping up her bronzed glow as she paraded around in her simple black swimsuit

Glorious: She was topping up her bronzed glow as she paraded around in her simple black swimsuit 

Toned and tanned: Her gym-honed physique was on display in the black swimsuit

Looking good: She put on a stunning display

Toned and tanned: Her gym-honed physique was on display in the black swimsuit 

Impressive: Oli beamed as she showed off a perfect dive into the cool blue waters of St Tropez

Impressive: Oli beamed as she showed off a perfect dive into the cool blue waters of St Tropez 

***
Read more at DailyMail.co.uk