Karl Stefanovic's mother Jenny has taken to Instagram to reach out to her grandson, Jackson, after the Today show hosts ex-wife Cassandra Thorburn claimed his family have 'discarded' herself and their three children.
Last week, Cassandra did a tell-all interview with the Australian Women's Weekly claiming Karl's friends and family had 'discarded and disposed of' their children in the wake of her split from the TV star.
Following Cassandra's comments, Jenny posted an Instagram birthday tribute to her grandchild, Jackson, as he turned 19, on Tuesday.
Alongside a picture of a birthday card, Jenny wrote: 'Happy 19th birthday Jackson.l hope you have a great day celebrating while overseas.I really hope the universe is able to get you see my/our wishes.
'Love you heaps Jackson Little nanny 😘🎂'
The teenager is yet to respond to his grandmother's plea.
Following Thorburn's tell-all, a spokesperson for the Stefanovic family told TheFix, 'We are disappointed Cass would claim such inflammatory suggestions that we have alienated Karl's children from our family,' the statement read.
'Nothing could be further from the truth. Karl regularly co parents his children and has his loving family around them.'
They added: 'We refuse to keep a running dialogue of the children. There are custody and financial matters before the Family Court and Karl has abided by every single one of them and we will not jeopardise it. Family is often compromised when parents go through a painful divorce and we do our best to continue our love and support for the children.'
Stefanovic and Thorburn announced their split in September 2016, after 21 years of marriage.
The Today presenter is now engaged to shoe designer Jasmine Yarbrough.