IT'S OFFICIAL - Today host Karl Stefanovic will be a married man again after becoming engaged to fashion designer Jasmine Yarbrough.

The Daily Telegraph confirmed the high-profile couple are set to wed following their appearance at the Harper's Bazaar Australia's 20th anniversary event in Sydney.

The Sydney outlet, according to a source close to the couple, reported Stefanovic and Yarbrough were "very happy and enjoying this special time together".

The confirmation follows speculation last week that the couple had secretly become engaged following their year-long romance.

Stefanovic and Yarbrough met on a party boat in December, 2016, just months after he split from Cassandra Thorburn, his wife of 21 years and mother of his three children.

However, Stefanovic and Yarbrough's debut as newly engaged couple wasn't without its hiccups with reports suggesting they avoided being photographed and Stefanovic was 'acting bizarre'.

But the cat was out of the bag when the couple met up with celebrity chef Matt Moran.

"She showed Matt Moran the ring and then gave a pat on the back to Karl Stefanovic," photographer Christian Gilles told The Daily Telegraph.