Hayley Holt will replace Hilary Barry on Breakfast. Photo/Dean Purcell Holt, who has plenty of presenting experience from her time fronting Prime TV's The Crowd Goes Wild, said her new job felt "surreal".
"I've watched the programme for years and it feels slightly surreal to know I'll be hosting the show alongside Jack in a week's time," she said.
"I hope he knows what he's in for."
Jack Tame and Hayley Holt will host Breakfast together. Feedback was positive about the changes, with one saying "I literally yelped" after hearing Barry was joining Seven Sharp.
Green Party leader James Shaw congratulated Holt but admitted the party was "gutted" to be losing her.
The news comes as The Project, Seven Sharp's prime time current affairs competitor on Three, prepares to return to screens tonight.
That's three weeks before Seven Sharp's return. One of this week's guests is Prime Minister Jacinda Ardern.
Read more: Current affairs shows returning to screens - but who will be hosting Seven Sharp?
Daniel Faitaua and weather man Matt McLean remain on the Breakfast team, which returns to screens next week.