Cassandra Thorburn and Karl Stefanovicโs oldest son rung in a very special milestone over the weekend โ his 21st!
And it looks like Jackson Stefanovicโs birthday will be one he remembers for years to come with his proud mother sharing a slew of touching photos from their celebrations.
Taking to Instagram on Sunday evening, Cass revealed her son celebrated in style with lawn bowls followed by an intimate family dinner.
โA fantastic 21st birthday weekend. Wings to fly #howiloveyouson,โ the mother-of-three penned alongside the album.

Cass, Jackson and younger sister Ava enjoyed a family dinner to mark the occasion.
(Image: @cassthorburn/Instagram)
Donning a pair of rainbow fairy wings, birthday boy Jackson tries his hand at lawn bowls.
(Image: @cassthorburn/Instagram)On Jacksonโs actual birthday, which fell on Friday August 28, Cass penned a heartfelt tribute to her oldest child with a collection of adorable throwback photos from Jacksonโs childhood.
โ21 years ago today I became a mum for the first timeโฆ Happy 21st to my super hero sonโฆ who has brought so much joy to his siblings and I with his contagious laugh,โ the childrenโs author mused.
Cass and Jackson share an incredibly close bond with the 21-year-old previously telling Womanโs Day: โMy mother is the most extraordinary person.โ
โWatching her, Iโm reminded how she gives everything 100 per cent, whether thatโs being the worldโs best mother, or just nailing the cha-cha-cha. She is amazing,โ he explained during his motherโs appearance on Dancing With The Stars last year.

Cassandra paid tribute to her โsuper heroโ son Jackson.
(Image: @cassthorburn/Instagram)
โHappy 21st to my super hero sonโฆ who has brought so much joy to his siblings and I with his contagious laugh,โ the proud mother beamed.
(Image: @cassthorburn/Instagram)Since Karlโs divorce from Cassandra Thorburn, Jackson has had a complicated relationship with his famous dad, only reuniting with him when he married Jasmine Yarbrough in Mexico in December 2018.
Jackson, who has deferred studying music after starting a degree course last year, championed his mum following the public divorce, telling Womanโs Day in a previous interview that โsomeone had to step up and protect her.โ
However behind-the-scenes, the pair have been working on their relationship.
Even Cassandra, who has told friends of Jacksonโs struggle with his parentsโ divorce and the acrimony that followed, says sheโs hopeful the father and son can mend their relationship.

Big brother Jackson with younger siblings Ava and River.
(Image: @cassthorburn/Instagram)โI think itโs great that Jackson is spending time with his dad,โ she told Womanโs Day in September last year.
Karl shares Jackson, 21, daughter Ava, 14, and son River, 12, with ex-wife Cass and in May this year, welcomed daughter Harper with second wife Jasmine.

Karl has had a rocky relationship with his son but it appears things are on the mend.
(Image:@karlstefanovic_/ Instagram)