'People are worried about paying their bills... and Harry's worried about the ... trends now
Kate - who has won two NTA awards - sounded exasperated as she pointed out people were worried about surviving on their wages while Harry complained about his stately home bed chambers.
And co-host Ben Shepherd appeared utterly bemused as he pointed out Harry's gripe about older brother getting the biggest room happened in families across the world.
Veteran correspondent and ITV Royal Editor Chris Shop appeared surprised at the contents
The stepped-down Royal, 38, and his book were leaked five days to the entire world yesterday as Spain put it up for sale in shops the week before its publication date.
Since then its entire contents have been analysed, leaving little content for those who had pre-paid their hard-earned money for the Penguin publication this Monday.
GMB was speaking about the details in the book this morning when the exchange occurred.
ITV royal editor Chris Ship said: 'Talking in the book, as we now know he did, about William in Balmoral had the bigger bedroom and the double bed and he had the wardrobe with the mirrors and I had the shady corner if you like.'
Prince Harry, right, said that Prince William, left, had a bigger and better than him at Balmoral
The Duke of Sussex has spoken out again over the alleged confrontation between himself and his brother, the Prince of Wales, in an interview with ITV's Tom Brady
Kate then added 'It sounds so petty though' to which Chris agreed 'It sounds petty'.
She then declared: 'People out there worried about paying their bills, the idea he was worried about the size of a wardrobe doesn’t sound like the Harry that did all these wonderful things.'