Roxy Jacenko's husband Oliver Curtis rang in his 40th birthday over the weekend and debuted a dashing new look as he celebrated with friends and family.

The businessman was all smiles in photos his PR maven wife, 45, shared to Instagram, and he appeared to be embracing his new silver fox status.

Oliver, who typically sports light brown locks, seems to have gone grey and revealed his new 'do in the latest images of his milestone celebration, which was held in Athens, Greece. 

The change was first noted on Sunday when Roxy shared an image of her husband posing with their children Pixie, 13, and Hunter, 11, without his trademark cap on. 

He stood next to a four-tier white and blue cake with his grinning kids, wearing a floral baby blue shirt and beige slacks at the venue, Taverna37.

A few days later, Roxy uploaded a group photo taken at the Four Seasons Astir Palace Hotel Athens where she, Oliver and their kids appeared to be staying.

Oliver could be seen standing on the right side of the group with his daughter Pixie, and his locks were very noticeable beneath the sunlight. 

He also appears to have changed up his hairstyle slightly, opting for a more slicked-down approach rather than his usual voluminous quiff. 

It comes after Roxy addressed rumours her marriage to Oliver is on the rocks, as he had seemingly vanished from her Instagram until his recent birthday.

She firmly denied speculation they have broken up, and told Daily Mail in May the real reason the former high-flying investment banker has gone off the grid

Roxy said while it might seem like Oliver has 'disappeared', it was more of a case of business as usual.

Oliver, a former Macquarie banker and son of wealthy mining industry executive Nick Curtis, could be well on the road to becoming a billionaire.

He turned a $250,000 personal investment in Firmus Technologies into a whopping $81 million last year.

His business is based in Singapore and the company has a facility in Launceston, Tasmania. 

'Oli has never been keen on social media—he works hard and wants to focus on that without the noise of social media,' Roxy explained.

'My work is in social media, so it's an important part of my day-to-day, it’s a business for me. It's not for him and I respect that.'

The family relocated to Singapore in 2023, with Roxy frequently jetting back to Australia for work and Oliver conspicuously absent during her Down Under trips.