Princess Charlotte has been giving the Duke of Cambridge "a few sleepless nights", he has told England Women's World Cup squad.
Prince William met the team at the National Football Centre today, before they jet off on Monday to start their campaign in Canada.
England captain Steph Houghton, who was born in Durham and used to play for Sunderland, said the Duke told them about life with new arrival Charlotte, and older sibling Prince George.
William, who is president of the Football Association, met the Lionesses at St George's Park in Staffordshire.
Usually we get around two royal visits a year. Today we had two in the same day.
Prince Charles was on Teesside but Prince William stole the show interacting with crowds and stopping for pictures in South Shields.
Jonny Blair reports.
The Duke of Cambridge speaks with children as he arrives at the Haven Point leisure centre in South Shields.
The Duke of Cambridge got his hands dirty as he helped to prepare a chicken curry during a visit to a centre for young homeless people.
Prince William was visiting Centrepoint's Sunderland base where he was hearing about the challenges faced by young people as they try to rebuild their lives.
During the visit he donned an apron and joined in with a cookery lesson.
Two future kings are in the North East.
Prince William and Prince Charles are here on separate official visits.
The Duke of Cambridge is in Sunderland, while his father is at a celebration of industry on Teesside.
The Duke of Cambridge has been hearing about the challenges homeless young people face as they try to rebuild their lives.
Prince William was visiting to the homeless charity Centrepoint's base in Sunderland.
He was also given a tour of the centre and got the chance to meet the people currently staying there.
Wade Tench, 20, told him that he could not thank the centre enough for what it had done for him.
"Here I have begun to learn about independent living and learned skills like budgeting and other skills," he said.
"They helped me get on to a course at Nissan and it's like a home away from home."
After hearing about how much the young people appreciate the centre, William said: "The support here is so good you probably don't want to leave."
The Duke, who is patron of Centrepoint, heard how they are working with The Prince's Trust, the youth charity founded by his father, the Prince of Wales.
The Prince of Wales meet new apprentices on a visit to the offices of PD Ports to mark the 50th anniversary of trade through the Tees Dock in Middlesbrough.
Prince William has been visiting the homeless charity Centrepoint while on a visit to Sunderland.
The Duke of Cambridge, who is a patron of the charity, was shown their new accommodation centre in the city.