They've continued to keep their romance private since first being spotted out and about at the beginning of the year. 

But Nina Dobrev didn't hold any secrecy about her love for Grant Mellon back on Saturday, spotted enjoying a steamy beach day in Maui, Hawaii. 

The 30-year-old beauty flaunted her incredibly bikini body physique while packing on the PDA with her beau.  

Fit and toned: Nina Dobrev showcased her bikini body on Saturday while enjoying a day at the beach in Maui, Hawaii, with her boyfriend, Grant Mellon

Fit and toned: Nina Dobrev showcased her bikini body on Saturday while enjoying a day at the beach in Maui, Hawaii, with her boyfriend, Grant Mellon

Nina opted for a red and white checkered Waderlust Swim suit that drew attention to her ample cleavage and had a clip at the back to ensure there were no wardrobe malfunctions. 

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She teamed her top with a matching pair of bottoms that had string ties on each side. 

The Vampire Diaries star's bikini ensured her incredibly toned physique was out on display, with all eyes on her washboard abs. 

Love is in the air: Nina and Grant struggled to keep their hands off of each other and packed on the PDA while out at the beach

Love is in the air: Nina and Grant struggled to keep their hands off of each other and packed on the PDA while out at the beach 

Gorgeous: Nina opted for a red and white checkered Wanderlust Swim suit that drew attention to her ample cleavage and had a clip at the back to ensure there were no wardrobe malfunctions

Gorgeous: Nina opted for a red and white checkered Wanderlust Swim suit that drew attention to her ample cleavage and had a clip at the back to ensure there were no wardrobe malfunctions

Cute suit: She teamed her top with a matching pair of bottoms that had string ties on each side Masterpiece: The back of Nina's suit featured a clip to hold it altogether

Cute suit: She teamed her top with a matching pair of bottoms that had string ties on each side

Picture-perfect: Nina spent much of the afternoon playing with her wet hair following a dip in the ocean

Picture-perfect: Nina spent much of the afternoon playing with her wet hair following a dip in the ocean 

Nina accessorised her look with a pair of trendy dual toned shades and opted for some white hooped earrings. 

She styled her brunette tresses out while swimming through the water and appeared to be makeup free. 

And love was clearly in the air for the beauty and her beau Grant, seen packing on the PDA while enjoying the day by the beach. 

Not just a pretty face: At one point, she stood up on Grant's shoulders to perform quite the impressive trick

Not just a pretty face: At one point, she stood up on Grant's shoulders to perform quite the impressive trick 

Impressive: Nina showcased her back-flip skills while standing on he beau's shoulders and flipping off Impressive: Nina showcased her back-flip skills while standing on he beau's shoulders and flipping off Impressive: Nina showcased her back-flip skills while standing on he beau's shoulders and flipping off

Impressive: Nina showcased her back-flip skills while standing on he beau's shoulders and flipping off 

Warming up! Resting for a minute, the actress was also seen sitting on his shoulders

Warming up! Resting for a minute, the actress was also seen sitting on his shoulders 

Talented: Onlookers appeared quite impressed with Nina's flipping abilities

Talented: Onlookers appeared quite impressed with Nina's flipping abilities 

Grant was topless and opted for a pair of black and white shorts while on vacation with his lady love. 

Throughout their time together, Nina was also seen sitting on his shoulders before showcasing her impressive skills by performing a back-flip. 

Nina was also seen treating herself to a icy cold drink and threw on a floral sheer cover-up when arriving and leaving.  

Chic: Nina was also seen treating herself to a icy cold drink and threw on a floral sheer cover-up when arriving and leaving

Chic: Nina was also seen treating herself to a icy cold drink and threw on a floral sheer cover-up when arriving and leaving

Accessories: Nina accessorised her look with a pair of trendy dual toned shades and opted for some white hooped earrings Carefree: She styled her brunette hair out while in the ater

Accessories: Nina accessorised her look with a pair of trendy dual toned shades and opted for some white hooped earrings

Honeymooners: Nina and Grant struggled to keep their hands off of each other on Saturday

Honeymooners: Nina and Grant struggled to keep their hands off of each other on Saturday 

Activities: Fellow beach-goers also revealed that the pair and the group they were with enjoyed a nice round of volleyball as well to fill up the day

Activities: Fellow beach-goers also revealed that the pair and the group they were with enjoyed a nice round of volleyball as well to fill up the day

Fellow beach-goers also revealed that the pair and the group they were with enjoyed a nice round of volleyball as well to fill up the day. 

While it's not known the exact date Nina and Grant began dating, he attended her 30th birthday party back in January and they pair sat front row at a LA Laker's game in March.  

Nina starred for six years as Elena Gilbert on The CW series The Vampire Diaries.

Rise to fame! Nina starred for six years as Elena Gilbert on The CW series The Vampire Diaries

Rise to fame! Nina starred for six years as Elena Gilbert on The CW series The Vampire Diaries

Going strong: While it's not known the exact date Nina and Grant began dating, he attended her 30th birthday party back in January and they pair sat front row at a LA Laker's game in March

Going strong: While it's not known the exact date Nina and Grant began dating, he attended her 30th birthday party back in January and they pair sat front row at a LA Laker's game in March

Working girl: Since the series ended in 2017, she appeared in a 2017 TV reboot of Flatliners, the 2018 romantic comedy Dog Days and the comedy Then Came You that had a limited theatrical release in February

Working girl: Since the series ended in 2017, she appeared in a 2017 TV reboot of Flatliners, the 2018 romantic comedy Dog Days and the comedy Then Came You that had a limited theatrical release in February

Since the series ended in 2017, she appeared in a 2017 TV reboot of Flatliners, the 2018 romantic comedy Dog Days and the comedy Then Came You that had a limited theatrical release in February.

She also starred in the CBS sitcom Fam which has just been canceled after one season, but recently won her the Teen Choice Award for favorite Comedy TV Actress.  

Nina was up against; Candace Cameron Bure (Full House), Gina Rodriguez (Jane The Virgin), Kaley Cuoco (The Big Bang Theory) and Sarah Hyland (Modern Family). 

Artistic: The beauty also shared a sweet photo from her day on Instagram

Artistic: The beauty also shared a sweet photo from her day on Instagram 

Winner! Nina recently starred in the CBS sitcom Fam which has just been canceled after one season, but recently won her the Teen Choice Award for favorite Comedy TV Actress

Winner! Nina recently starred in the CBS sitcom Fam which has just been canceled after one season, but recently won her the Teen Choice Award for favorite Comedy TV Actress

'Well, this is great news to wake up to. Thank you to everyone who voted and supported the little show that could‼️' she began on Instagram last month.    

'The whole FAM is grateful to all the FANS ♥️♥️♥️ you guys. Shout out to all the incredibly talented and HILARIOUS ladies in the category.' 

'Dedicating this award to all you badass women! Let’s keep making the world laugh. We need it now more than ever. @teenchoicefox @candacecbure @hereisgina @kaleycuoco @sarahhyland.' 

Having the beat day: At one point, the brunette added a pink dress over her ensemble while with a friend

Having the beat day: At one point, the brunette added a pink dress over her ensemble while with a friend 

Heeled just in time! The past few weeks have seen Nina on crutches, however, her foot appeared to be completely heeled before going swimming on Saturday Heeled just in time! The past few weeks have seen Nina on crutches, however, her foot appeared to be completely heeled before going swimming on Saturday

Heeled just in time! The past few weeks have seen Nina on crutches, however, her foot appeared to be completely heeled before going swimming on Saturday 

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