Kate looks set to be given a new power by King Charles in a pivotal display of his confidence in the Princess of Wales.
The King is expected to give senior members of the Royal Family the power to grant Royal Warrants.
The Princess of Wales could be given the responsibility alongside Queen Camilla and Prince William.
The monarch decides who grants royal warrants, Prince Philip and Charles when he held the title of the Prince of Wales had the power alongside Queen Elizabeth II.
The Princess of Wales could be given the responsibility alongside Queen Camilla and Prince William.
PA
Currently, only King Charles has the power but he may grant Queen Camilla, Prince William and the Princess of Wales a similar role he held under the late Queen.
Royal commentator Richard Fitzwilliams backed granting Kate the power to issue Royal Warrants.
Fitzwilliams said: "This would seem very practical because remember William, Kate and their family are the monarchy of the future. It would make total sense if he did decide that."
He continued: "It would be very important to her.
"It would be an important step, we know she has his confidence and this would be a very good way of showing it."
The Princess of Wales celebrated her 42nd birthday earlier this week and spent the day with her family.
Some existing warrant holders told the Mail that having Kate officially endorse them would be a "huge boost to the British industry".
LATEST ROYAL NEWS:
The Princess of Wales celebrated her 42nd birthday earlier this week and spent the day with her family.
PA
One said: "Interest would go through the roof, particularly in areas such as fashion and lifestyle."
There will be an upcoming review of Royal Warrants for a group of around 800 firms that supply the royal household.
The document which allows firms to use the Royal Arms in their branding is held by Burberry and Barbour in addition to many other exclusive garment makers.
