Karl Stefanovic has marked the arrival of brother Peter Stefanovic and Sylvia Jeffreys‘ newborn baby with a wildly inappropriate joke on the TODAY Show.
With little Oscar Hamilton Stefanovic bringing much joy to the Stefanovic family, Karl couldn’t contain himself.
WATCH: Karl Stefanovic makes inappropriate joke about his baby nephew
‘This is magnificent news,’ he told viewers. ‘My gorgeous brother Peter and my even more gorgeous sister-in-law Sylvia have welcomed a beautiful little boy into the world.
‘It makes me want to cry! That’s little Oscar Hamilton Stefanovic, weighing in at 3.4 kilos. He is perfectly healthy, Sylvia says, and just like his uncle has a massive…’
Jumping in to save the moment, co-host Allison Langdon interjected, ‘Personality!’
Continued a clearly thrilled Karl, ‘Congratulations to you both. Lots of love from everyone here at the Today show… Well done, Sylvia.’
Taking to her Instagram on Thursday, Sylvia confirmed the news by sharing an adorable snap along with the caption: ‘Our beautiful boy, Oscar Hamilton Stefanovic.’
They added: ‘3.4kg, deep blue eyes and perfectly healthy. He’s absolute magic.’

In the delightful pic, Peter is cradling his little sleeping son, who is dressed in an adorable little pastel blue romper.
Enthusiastic fans were quick to take to social media to congratulate Peter and Sylvia on the birth of their son, with one person writing: ‘So beautiful Sylvia! Congratulations.’
‘What a beautiful little man. Congratulations,’ another person stated.

A third person added: ‘Congratulations Sylvia. Such a beautiful baby boy and gorgeous name.’
Peter also shared the news on his Instagram account by posting a delightful snap of proud mum Sylvia holding her new bub.
‘We’ve got our own Oscar! I’m so unbelievably proud of @sylviajeffreys and our new best mate. Love is strong. Life is fantastic,’ Peter captioned the snap.