Sports Illustrated model Nina Agdal plants a kiss on boyfriend Jack Brinkley Cook while frolicking on the beach in bikini

She is an alumna of the Sports Illustrated Swimsuit Issue.

And Nina Agdal, 27, put her showstopping bikini body on display as she frolicked around a beach in the Hamptons on Tuesday.

The Danish model shared a passionate kiss with her shirtless boyfriend Jack Brinkley-Cook, the son of her fellow Sports Illustrated veteran Christie Brinkley.

When you got it: Nina Agdal, 27, put her showstopping bikini body on display as she frolicked around a beach in the Hamptons on Tuesday
Turning up the heat: The Danish model shared a passionate kiss with her shirtless boyfriend Jack Brinkley-Cook, the son of her fellow Sports Illustrated veteran Christie Brinkley

When you got it: Nina Agdal, 27, put her showstopping bikini body on display as she frolicked around a beach in the Hamptons on Tuesday

Nina, who used to date Leonardo DiCaprio, opted for a pale green two-piece that showed off her derriere to full advantage as she waded into the sea.

The celebrity hot couple were joined by a muscular shirtless male pal when they were seen swimming toward a cresting wave.

When an Instagram commenter sniped in January that she would not date Jack 'If he was broke,' Nina vamped in a reply: 'probably not'.

Jack's biological father is Christie's third ex-husband Richard Taubman, but he was adopted by her fourth ex-husband Peter Cook - not to be confused with the late English comedian of the same name. 

Sensation: Nina, who used to date Leonardo DiCaprio, opted for a pale green two-piece that showed off her derriere to full advantage as she waded into the sea

Sensation: Nina, who used to date Leonardo DiCaprio, opted for a pale green two-piece that showed off her derriere to full advantage as she waded into the sea

Dripping wet: The celebrity hot couple were joined by a muscular shirtless male pal when they were seen swimming toward a cresting wave

Dripping wet: The celebrity hot couple were joined by a muscular shirtless male pal when they were seen swimming toward a cresting wave

Wit: When an Instagram commenter sniped in January that she would not date Jack 'If he was broke,' Nina vamped in a reply: 'probably not'

Wit: When an Instagram commenter sniped in January that she would not date Jack 'If he was broke,' Nina vamped in a reply: 'probably not'

Dive into the ocean like Nina Agdal in her Rove bikini

Nina Agdal looked like she was ready to dive into the ocean today in her Rove bikini in the Hamptons with her boyfriend Jack Brinkley Cook.

We really love this bikini not only because it has a great green striped pattern but because of how both the top and the bottoms are designed. The top has a cute front bow tie which is super on trend and the bottoms have bamboo rings on the sides reminding us of beaches on far away islands. The simple bandeau silhouette makes this an easy top to wear in the waves and on the beach to tan.

If you are keen on getting this look for yourself, click right for the top and click the first link below for the bottoms. Or if you want to see if you can get the look for less, check out our picks below from brands like L*Space, Indah, and Solid & Striped.

* PRICES MAY NOT BE AS ADVERTISED

In fact, the only famous husband Christie had was her second, Billy Joel, who is the father of her 33-year-old firstborn child Alexa.

Billy's 1983 classic Uptown Girl was inspired by Christie - and during a 2014 concert at Madison Square Garden, 20 years after their marriage fell apart, he sang it live for her as she beamed in the audience.

Peter and Christie have a 21-year-old daughter called Sailor Brinkley-Cook, who has followed in her mother's footsteps and modeled for Sports Illustrated. 

Christie and Peter's marriage stretched from 1996 to a rancorous divorce in 2008 after he copped to adultery with a woman he hired as an assistant when she was 18. 

Practical: Nina occasionally wore her hair gathered up into a bun to keep it out of her eyes as she enjoyed the water

Practical: Nina occasionally wore her hair gathered up into a bun to keep it out of her eyes as she enjoyed the water

Down she goes: Nina plunged headfirst into a wave as it broke

Down she goes: Nina plunged headfirst into a wave as it broke

Post-Christie, Peter married a woman called Suzanne Shaw, who sniped in 2012 that she had jetted off to Indonesia because of his 'vengeful' previous wife.

Suzanne wrote to the New York Post: 'The black cloud of Christie Brinkley’s hate [that] has hung over our lives for the five years I have been with Peter, and has taken an unhappy toll on me and my daughter’s life - on all our lives. I needed a break.'

Jack sprang to Christie's defense, calling the claims 'lies' and telling the MailOnline: 'I rarely ever hear my mother or father discuss one another mean while there have been many instances where I have heard my fathers wife mention my mother.'

In 2014, Suzanne left her husband, told Page Six that 'I fell under Peter's spell' and publicly apologized 'for my part in causing Christie any unnecessary pain.'

Family history: Jack was sired by Christie's third ex-husband Richard Taubman but was then legally adopted by her fourth ex-husband Peter Cook

Family history: Jack was sired by Christie's third ex-husband Richard Taubman but was then legally adopted by her fourth ex-husband Peter Cook

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Nina Agdal flashes swimsuit body as she passionately kisses shirtless beau Jack Brinkley Cook

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