The event was held in the back garden of a private house in Palm Beach, and was attended only by the immediate family and the closest friends of the 43 year old Today host and 34 year old shoe designer.
After the ceremony, a delighted Karl told The Sunday Telegraph: “We are very much in love. We clicked right from the start.
“It’s a commitment ceremony. It was lovely.”
The event came as a huge surprise to many, particularly Karl's youngest children, Ava, 13, and River, 11, who are believed to have not known nothing about the ceremony until 3pm that afternoon when they were already at the venue, according to the Sydney Morning Herald.
The publication states this caused much upset.
Furthermore, Karl’s eldest son, Jackson, 18, reportedly did not attend.
Peter Stefanovic and wife Sylvia Jeffreys, who both work with Karl at Channel 9 were both spotted at the ceremony.
Richard Wilkins and executive producer Mark Calvert also attended the special day. Meanwhile, Karl will be off air for a week and the couple are expected to honeymoon in the South Pacific.
Commitment ceremonies, much like the ones seen seen on TV’s Married At First Sight, often involve the exchange of vows and rings, but they are not legally binding.
The ceremony comes after Karl and his former wife of 21 years Cassandra Thorburn finalised their divorce last year, after splitting in 2016.