Madeline Holtznagel Celebrates 30th Birthday with Western-Themed Bash

Model Madeline Holtznagel marked her 30th birthday with a western-themed celebration on the South Coast this weekend. The festivities took place on Friday night at The Whale, located on Narooma Beach.

Guests included Holtznagel's sister, model Simone Holtznagel, and Bernadette Sukkar, founder of Body by Berner. Other attendees featured stylist Caroline Tran, model Julia Cavanagh, and friend Simone Kaiser.

The celebration kicked off with an intimate gathering on Friday, with more guests arriving throughout the weekend. Holtznagel began her birthday morning in pink, lacy sleepwear and a cowboy hat, enjoying strawberries and treats while overlooking the sea. She later changed into a pink checkered bikini and straw cowboy hat for some sun on the beach with friends, followed by a blue athleisure outfit for a workout.

For an evening dinner, Holtznagel wore a $3,201 designer dress by Annie's Ibiza. Many guests shared photos online of their travel to Narooma Beach for the weekend events. The invitations requested guests join 'Maddy's Hoedown' and suggested themed gifts.

Holtznagel's partner, billionaire Merivale heir Justin Hemmes, was also in attendance. The couple has previously sparked engagement rumors, notably in September when Holtznagel was seen wearing a large diamond ring at an event. She was also seen wearing a diamond ring in June outside the mansion she shares with Hemmes.

The couple, together since 2019, welcomed their first child, Jaeger Justin Hemmes, on June 1, 2025. Holtznagel shared the news on Instagram. She previously stated in an interview that she was thrilled to be starting a new journey with Hemmes, a father of two daughters, Alexa and Saachi, from a previous relationship. Holtznagel mentioned she had kept her pregnancy private but was ready to share photos later in her term.

Madeline Holtznagel is the younger sister of model Simone Holtznagel, who welcomed her daughter Gia in March 2024.