Jasmine has yet to confirm the news.
Karl's post comes just a few weeks after Jasmine's friends hosted a lavish baby shower for her in New York City.
An attendee shared an Instagram story of Jasmine appearing to cuddle her belly superimposed with a ‘baby’ emoji, while another friend shared a snap from the dinner that read: “I love baby showers”.
Meanwhile, a close pal of the 35-year-old confirmed the baby news to The Daily Telegraph this month, saying the pair are beyond excited.
Stefanovic shares kids Jackson, 19, Ava, 13, and River, 12 with his ex-wife, Cassandra Thorburn.
Karl seems to be lapping up the sun before he returns to the Nine Network's breakfast TV show alongside Allison Langdon.
The network released a promo for the new look breakfast TV show on Instagram, with fans flooding the comments section with excitement