BBC Breakfast's Carol Kirkwood gasped 'how dare you?!' after a swipe from Naga Munchetty.
Carol, 60, was back on BBC Breakfast to give the latest weather updates.
Meanwhile Naga, 47, hosted the show alongside Roger Johnson, who was standing in for Charlie Stayt.
At the end of one of Carol's weather reports, Naga said: "It was a lovely day yesterday in many parts, though, so I can take a little lower today. It's good."
Carol replied: "You'll be pleased to hear then that on Sunday it's going to be dry with some sunshine for most of us. I know you like the sun, Naga…"
Naga then quipped cheekily: "Look at you bringing some good news for a change, Carol Kirkwood."
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Carol looked shocked before quickly hitting back: "How very dare you, Naga!"
As Naga giggled along with Carol, she replied: "Always, Carol. See you later."
Naga was joined by Roger, who is best known for presenting regional BBC programme North West Tonight, although he has presented BBC Breakfast on weekends since 2012.
However, today was one of the rare times he has presented on a weekday.
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Earlier this week, Ben Thompson, 41, stood in for Jon, 53, alongside Sally Nugent.
While Jon had hosted Mondays programme as normal, Ben was on the red sofa on Tuesday and Wednesday.
BBC Breakfast airs daily from 6am on BBC One.
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