Madeline Holtznagel is staying fit after giving birth to her newborn son Jaeger.

The model, 28, was seen for the first time in weeks on Tuesday as she completed a fitness class with Sydney Pilates queen Bernadette Fahey.

In an Instagram video, Madeline lay on a mat alongside chicken heir Johnny Ingham’s wife Rey Vakili while their newborn babies slept nearby.

In a second video, Madeline completed a series of exercises with a resistance band around her ankles while Bernadette held baby Jaeger.

The workout came just hours before the model attended the closure of her boyfriend Justin Hemmes’ restaurant in Manly.

The billionaire pub baron closed his Queen Chow restaurant at Manly Wharf on Tuesday as part of a redevelopment of the wharf area.

Madeline Holtznagel is staying fit after giving birth to her newborn son Jaeger in June. Pictured Madeline with boyfriend Justin Hemmes and their son

The model, 28, was seen for the first time in weeks on Tuesday as she completed a fitness class with Sydney Pilates queen Bernadette Fahey

He posted a tribute to his staff and thanked his customers on Instagram following the venue’s closure.

‘And that’s a wrap…. 12 wonderful wonderful years. Thank you to all our incredibly loyal, supportive and just plain fabulous customers,’ he wrote.

“I extend my heartfelt gratitude to all the incredible staff who have worked both in the kitchen and on the floor, delivering the enchanting Merivale experience to our guests… Thank you! I’m truly going to miss this amazing place.”

Justin also posted a photo of Madeline with baby Jaeger enjoying a meal at the high-end restaurant.

Madeline announced the birth of their son on Instagram on June 15 alongside a gallery of sweet photos.

‘Jaeger Justin Hemmes 1.06.25,’ she captioned the post, which has received over 3,000 likes since being posted.

This is the model’s first child with the billionaire Merivale owner.

He shares two daughters – Alexa, nine, and Saachi, seven – with his ex-partner Kate Fowler.

In an Instagram video, Madeline completed a series of exercises with a resistance band around her ankles while Bernadette held baby Jaeger

The workout came just hours before the model attended the closure of her boyfriend Justin Hemmes’ restaurant in Manly

Justin posted a tribute to his staff and thanked his customers on Instagram following the venue’s closure

The sweet photo dump included an array of snaps showing the couple’s newborn baby wrapped up in a blanket.

One picture showed the new mum proudly holding her first child as she donned a matching pink pyjama set.

She was positively glowing as she beamed at the camera while her precious newborn wore a smile on his face.

Another picture showed Justin and Madeline looking windswept and content as they enjoyed a beach walk with their little one.

One adorable snap showed Justin leaning down to kiss baby Jaeger, who was tucked into his jumper to keep warm during the windy outing.