Alessandra Ambrosio sparks rumors she's engaged to boyfriend Buck Palmer after fans spot ring on THAT finger

Alessandra Ambrosio fueled rumors that she is engaged, or even married, to longtime beau Buck Palmer with recent Instagram photos.

The 45-year-old Brazilian supermodel, who recently posed with her blended family, showed off her incredible figure in a green and yellow bikini while casually wearing a diamond on her ring finger.

She made no mention of the jewelry, an engagement or marriage as she marked the start of the FIFA World Cup, writing in Portuguese: 'Go, Brazil.'

Ambrosio has been dating Palmer, a jewelry designer, since late 2024.

The two first sparked engagement rumors when the former Victoria's Secret Angel shared Instagram photos with a gold band on her ring finger this past spring. 

'If Alessandra is engaged she has not told her friends yet, but everyone feels like she and Buck are headed that way because they are very serious and in love, so this may be a big hint from her that they are headed toward matrimony,' a source exclusively told The Daily Mail in April.

'It is likely that he designed that ring she is wearing on her wedding finger because that's his job - he designs jewelry.'

In an Instagram post from an Indonesian vacation in mid April, both the supermodel and designer wore gold bands on their ring fingers. 

The Daily Mail contacted the couple's respective representatives for comment but did not hear back. 

Ambrosio and Palmer were first romantically linked at a party during Miami's Art Basel in 2024.

Insiders confirmed at the time that the smitten fashion model hoped to be with her new partner 'for her entire life' due to their deep connection.

'Alessandra knows who her New Year's Eve kiss is going to be, and she hopes to have the same man to kiss for every New Year's Eve for her entire life,' a source exclusively dished to The Daily Mail at the time.

'She has been through the wringer in relationships but really truly believes in love and feels like she finally found it.'

In 2025 the superstar told Us Weekly that she and her beau connect through their 'passion for life.'

'We just love life to the fullest,' she told the outlet.

She added, 'We love living life and spending time together and enjoying every little thing. I guess it’s the little things, sometimes, that count more. Whatever we do, we both just have this passion for life.'

The mom of two shares daughter Anja, 17, and son Noah, 14, with ex-fiancé Jamie Mazur.

The couple broke off their engagement in 2018, ten years after Jamie initially popped the question. 

In a 2023 interview with Schön! Magazine China, Ambrosio shared: 'I believe that [a] positive attitude and outlook on life can change how we see life and sometimes how other people see life.

'Living in the present, enjoying each moment and spending time with people that matter to you is very important.'

She also told the publication about her future ambitions, following her twenty-plus years in the modeling industry.

'I would love to host my own show and still work with some of the amazing up-and-coming designers, as they inspire me with their creativity and how they keep on coming up with these never-before-seen designs.'