The Aussie guy who hit the ultimate jackpot! Australian jewellery designer Buck Palmer enjoys a holiday in Rio de Janeiro with Brazilian supermodel Alessandra Ambrosio after his split from wife Ashley Hart

Australian jewelry designer Buck Palmer has been enjoying the sun in Rio de Janeiro with his supermodel girlfriend Alessandra Ambrosio.

The pair were all smiles on Monday as they strolled arm-in-arm through the streets, soaking up the laid-back Brazilian lifestyle in coordinating summer outfits.

Alessandra, 43, looked stunning in a white lace crop top paired with flowing pastel yellow trousers and accessorized with trendy white sunglasses and sandals.

The Brazilian supermodel oozed glamor in the stylish top that highlighted her toned figure, paired with soft, flowing pastel yellow pants for a breezy, feminine look.

The Victoria’s Secret Angel’s long, lustrous hair flowed in natural waves and framed her face beautifully and she completed that with understated jewelry.

Australian jewelry designer Buck Palmer was spotted sunbathing with his supermodel girlfriend Alessandra Ambrosio in Rio de Janeiro on Monday. Both shown

Meanwhile, Buck kept it casual yet stylish in a crisp white T-shirt, beige trousers and green Chuck Taylor sneakers, topped off with a green LA-branded cap and aviator sunglasses.

They strolled through the streets enjoying the vibrant energy of the city before they were spotted laughing as they posed for a selfie on a hotel balcony, Buck cheekily flashing a peace sign.

Buck’s highly publicized divorce from Australian model Ashley Hart took place in 2017, after two years of marriage.

In December, Alessandra declared her love for her new boyfriend Buck in a splashy birthday tribute.

The Victoria’s Secret model and the Australian jewelry designer made their romance public late last year at a party at Art Basel in Miami.

Alessandra, 43, looked effortlessly gorgeous in a white lace crop top paired with flowing pastel yellow pants and accessorized with trendy white sunglasses and sandals

Alessandra, 43, looked effortlessly gorgeous in a white lace crop top paired with flowing pastel yellow pants and accessorized with trendy white sunglasses and sandals

The pair were all smiles as they strolled arm in arm through the vibrant streets, soaking up the laid-back Brazilian lifestyle in coordinated summer outfits

The pair were all smiles as they strolled arm in arm through the lively streets, soaking up the laid-back Brazilian lifestyle in coordinated summer outfits

Now Alessandra has hinted that their relationship is getting serious as she shared a loving birthday tribute to Buck on Instagram.

She teased that their romance has been going on for a while now, as she shared a huge gallery of loved-up photos and videos of the two of them.

Among the slideshows were sweet photos of them cozying up for romantic date nights and packing on the PDA as they shared a series of kisses.

In a caption, she declared her love for her new partner, whose ex-wife Ashley Hart is the sister of Alessandra’s fellow Victoria Secret model Jessica Hart.

She wrote: ‘[Heart] you, birthday boy!!!’

Monday’s walk was a rare public display of affection for the couple, who have kept their romance relatively private and under wraps until now.

Although they only made their relationship public earlier this month, it appears the couple has been dating for quite some time, if Alessandra’s post is anything to go by.

She was previously seen with Buck in photos shared to Instagram of them having fun on the beach during a trip to the island of Kauai in Hawaii.