Madeline Holtznagel kept things refreshingly low-key on Mother's Day on Sunday, when she was spotted enjoying a relaxed outing in Sydney's Double Bay with her baby son Jaeger.
The 29-year-old model -- partner of billionaire hospitality boss Justin Hemmes -- looked effortlessly stylish as she carried her tot through the leafy harbourside suburb.
Dressed in her signature understated-chic style, Madeline opted for a black singlet paired with dark wide-leg trousers with a subtle stripe, and a coordinated baby carrier.
She finished the look with oversized black sunglasses, barely-there makeup and a fine gold necklace.
Baby Jaeger, meanwhile, was all smiles in her arms, clutching a small teddy bear as the pair made their way to a waiting black SUV.
Madeline later added a cosy oversized brown jacket as the morning air cooled -- a quick change that didn't interrupt the calm, easy rhythm of the outing.
The sighting offered a rare glimpse into life at home for the power couple, who welcomed Jaeger in 2025.
The couple, together since 2019, have largely kept their family life private, occasionally stepping out at select public events.
Last month, the Merivale billionaire and his model partner snatched up a glorious A-list seafront property in Byron Bay.
The hospitality mogul spent a reported $18 million on the secluded spread, which was last sold in 1998 for $875,000.
Situated just 1 km from Byron Bay at Belongil Beach, the sprawling estate covers 1,580.3 sqm and hosts a two-storey four-bedroom four-bathroom 'shack'.
Justin and Madeline have been settling into life as a blended family.
The A-list society couple stepped out at the opening night of the Tropfest short film festival in February with the billionaire publican's two older children.
The tycoon brought his daughters, Alexa, nine, and Saachi, seven, whom he shares with his ex-partner Kate Fowler.
Madeline later added a cosy oversized brown jacket as the morning air cooled -- a quick change that didn't interrupt the calm, easy rhythm of the outing.
The sighting offered a rare glimpse into life at home for the power couple, who welcomed Jaeger in 2025. The couple, together since 2019, have largely kept their family life private.
Madeline announced the arrival of her first child with the hospitality king on Instagram in June 2025 alongside a gallery of sweet photos.
'Jaeger Justin Hemmes. 1.06.25,' she captioned the post.
Madeline had earlier announced the sex of their baby in an interview with Stellar magazine, and said she was thrilled because she wanted a 'new journey' with Justin.
Madeline is the younger sister of fellow Aussie model Simone Holtznagel, who welcomed her first child, a daughter called Gia, in March 2024 with her now-ex-boyfriend Jono Castano.