Harper May Stefanovic, three
Harper was born at Sydney's Royal North Shore Private on May 1, 2020.
"Harper and Jasmine are doing well and dad had a great night's sleep. I am in awe. Harper is absolutely perfect," Karl wrote in an Instagram post announcing the news.
Karl loves to post about Harper, uploading various pictures to Instagram with his little one.
In June, Jasmine posted a heartbreaking video to Instagram about Respiratory Syncytial Virus (RSV).
"Today is the first day of Australia’s very first RSV Awareness Week. We had never heard of #RSV until our two-year-old daughter Harper was hospitalised with the virus last winter," Jasmine wrote.
Jasmine has talked about Harper's struggle with the virus.
"It was alarming to see how hard she was working to breathe, with her little ribs sucking in and tummy pulling up into her chest," she said in an interview with the Daily Telegraph.
Despite her struggles, Harper is a very cheeky and happy child... we all love seeing the adorable photos her parents post.
River Stefanovic, 17
River Stefanovic is Karl's youngest son. Karl shares River with his first wife, Cassandra.
It appears he likes to keep out of the spotlight with very few posts across his mum and dad's Instagram profiles, and no posts on his own private Instagram.
At the start of November 2023, Cass posted to Instagram to recognise her youngest child getting his license.
"And that’s a wrap on my driving instructor days. ❤️❤️🍾🍾," she wrote.
Ava Stefanovic, 18
Willow is the eldest daughter of Karl and his ex-wife Cassandra, and she is out living her best life!
She is currently living in London studying at the highly respected London College of Fashion. But this isn't her first time in the world of fashion...
Before graduating high school, she signed with the modelling agency Precision.
For Willow's 18th birthday celebrated on March 2023, Karl posted about how proud he is of his daughter.
"Happy birthday to our 18-year-old goddess. I'm so proud of you. I will love you forever. And beyond," he wrote.
Jackson Stefanovic, 24
Jackson is the eldest of the family, having celebrated his 24th birthday on August 28.
Jackson is similar to his brother, River, in that he appears to want to stay out of the spotlight, with not many photos of him across the parents' Instagram pages.
In 2022, Jackson spoke with Woman's Day about how music helped him manage his mental health issues and ADHD.
"I've battled my whole life with ADHD, and various other mental health issues, and at times I really struggled to find my place in the real world – I became this stone dead person," he said.
"But my passion for music and song, and for writing, has helped me wade through some pretty tough stuff."
For Jackson's 22nd birthday, Karl posted a happy birthday message to Instagram...
"Happy birthday to my eldest. A beautiful human. I love you to Brighton and back and a thousand times over," he wrote.