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Madeline Holtznagel pulled out all the stops for her 30th birthday bash this weekend as she hosted a western-themed celebration on the South Coast.
Glamorous socialites descended on Narooma Beach on Friday night to join the model for her joyous occasion at The Whale.
Photos shared to Instagram show her sister Simone Holtznagel was among the gaggle of guests, as well as Pilates queen Bernadette Sukkar.
Madeline kicked off the celebrations on Friday with an intimate gathering of her nearest and dearest while other guests were inbound.
The mother-of-one, who is in a long-term relationship with billionaire Merivale heir Justin Hemmes, began her morning with some strawberries and other treats.
She shared a photo of herself overlooking the sea while garbed in pink, lacy sleepwear and wearing a matching cowboy hat.
Madeline Holtznagel pulled out all the stops for her 30th birthday bash this weekend as she hosted a western-themed celebration on the South Coast
Glamorous socialites descended on Narooma Beach on Friday night to join the model for her joyous occasion at The Whale. Pictured: Joshua Clapp and Simone Holtznagel
A banner wishing her happy birthday alongside a balloon of the number 30 were positioned behind her as she held her breakfast in hand.
She later stripped down to a pink checkered bikini, donning a straw cowboy hat, as she soaked up some sun on the beach with friends.
Later, the model slipped the pink hat back on and traded her bathers for a blue athleisure look as she enjoyed a workout with her pal Simone Kaiser.
Following a relaxing morning, Madeline was then seen slipping into a $3,201 designer dress by Annie's Ibiza as she went out for dinner with loved ones.
Many of her birthday guests shared images online which showed them flying into Narooma Beach for the weekend celebrations.
Attendees included Madeline's lookalike sister Simone, who uploaded a photo of herself wearing a white cowboy hat along with the western-themed invitation.
Photos shared to Instagram show her sister Simone Holtznagel was among the gaggle of guests, as well as Pilates queen Bernadette Sukkar (pictured)
Madeline kicked off the celebrations on Friday with an intimate gathering of her nearest and dearest while other guests were inbound
At one point, the model slipped the pink cowboy hat back on and traded her bathers for a blue athleisure look as she enjoyed a workout with her gal pals
Body by Berner founder Bernadette was also in attendance, alongside model Julia Cavanagh, stylist and brand consultant Caroline Tran, and friend Kaiser.
Australian florist Sammy Bate, wedding photographer Sophie Brennan, and TJS Dance Academy founder Tarah Jane Scott made an appearance for the weekend.
Pip Edwards' ex-boyfriend Joshua Clapp was also spotted posing for photos with Simone.
Madeline's partner Justin was also in attendance, with the pair recently sparking engagement rumours.
The pair couldn't wipe the smiles off their faces in September when they attended the 2026 Ladies Luncheon Committee for the Royal Hospital for Women Foundation.
During their arrival at the event, Madeline flashed a large diamond ring on her left hand as she draped her arm around her billionaire pub baron partner at Mimi's in Coogee.
Following a relaxing morning, Madeline was then seen slipping into a $3,201 designer dress by Annie's Ibiza as she went out for dinner with loved ones. (Source: Madeline Holtznagel/Instagram)
Madeline also appeared to enjoy a night of cooking with her friends
Many of her birthday guests shared images online which showed them flying into Narooma Beach for the weekend celebrations
It wasn't long before the huge sparkler set tongues wagging, with one onlooker describing it as 'dazzling'.
Madeline all but confirmed their engagement in June after she was again seen wearing a diamond ring outside the waterfront mansion she shares with Justin.
Justin and Madeline, who have been together since 2019, largely keep their private life out of the spotlight.
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.
She revealed the sex of their baby in an interview with Stellar magazine, saying she was thrilled to begin a 'new journey' with Justin.
Stylist and brand consultant Caroline Tran was among the attendees
Madeline was gifted a Louis Vuitton handbag for her bithday
TJS Dance Academy founder Tarah Jane Scott (left) was also in attendance and seen posing for photos with friend Demi Mcgregor
Invitations sent out to guests asked them to join 'Maddy's Hoedown', and included on theme gifts
'I always thought I was going to have a boy. I knew I was going to be a boy mum,' she said.
'Justin has two beautiful little girls, so having a boy, it's like a whole new journey together.
'[The baby] is going to be his little best mate.'
Madeline said she previously kept details of her pregnancy private but was ready to share her journey.
'I keep a lot of my life private and I don't share a lot online anyway, so being pregnant wasn't really something that I was going to share online,' she said.
'I haven't posted about it and it's been nice to have some quiet time off Instagram.
'But obviously because I am in the public eye and we do get photographed quite a lot, I think now I'm at this point in my pregnancy where it's nice for me to be able to share some nice photos.'
Madeline is the younger sister of fellow Aussie model Simone, who welcomed her first child, a daughter called Gia, in March 2024 with her now-ex-boyfriend Jono Castano.
Meanwhile, Justin shares two children – daughters Alexa, nine, and Saachi, seven – with ex-partner Kate Fowler.
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