Host of the Today show Karl Stefanovic made a promise to lose 10 kilos in 10 weeks while interviewing obesity expert Dr Nick Fuller back in May.

And on Tuesday, the 45-year-old proudly showed off his results as he weighed himself at home that morning, and revealed he lost eight kilos.

The Channel Nine star admitted that he found it difficult to make time to exercise but said he was feeling “great”.

“In the last couple of weeks it’s been difficult with the baby and all that sort of stuff,” he said, referring to his youngest daughter, Harper May.

“It is life getting in the way of it a little bit, but it’s been a fantastic program,” he added, thanking Dr Fuller, who helped him throughout his health journey.

“It’s been toughest to find the time to exercise.”

Dr Fuller said: “It’s been a fun journey with you, but it’s just the start … we will get you to that 90 kilos and keep you there.”

Karl revealed that his program, which included a lighter evening meal, had helped him sleep better and he woke up feeling a lot more refreshed.

He did admit to finding the program tough, but that having Friday as a cheat day was helpful.

 “What really worked for me was being good from Sunday to Friday and then having a bit of a cheat meal on Friday – as long as that doesn't then bleed into Saturday and Sunday,” he said.

Karl's always-supportive co-host Allison Langdon praised him for his efforts.

“I’m very, very proud of you for the last 10 weeks. You've worked really hard on this,” the 41-year-old said.

“You fell off once or twice, but I think what's important is you stuck to this diet and the exercise regime,” she added.

This article originally appeared on Over60.