Prince William revealed his favourite way to spend his free time now he's a dad - and it's hilarious!

The Duke of Cambridge, Prince William has revealed what his favourite thing to do in his free time is, now he's a father of three.

The future King attended a gala dinner last night to celebrate the 30th anniversary of a London’s Air Ambulance fundraising campaign.

During the event, Prince William chatted to British music icon Eric Clapton, who asked him if he fills his free time with any hobbies.

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William, who is father to Prince George, six, Prince Charlotte, four and Prince Louis, one, then admitted that he rarely finds himself with time to spare and that when he does he spends it catching up on Zs.

“With the children it's quite hard to get the time off,” he said.

Credit: Getty

“Any free time I do get I sleep!”

This comes after the Duchess of Sussex revealed some very sweet details about Prince William’s 6-month-old nephew, Archie.

This week the Duchess and her husband Prince Harry spent the day with military families in Windsor, in honour of the lead up to Remembrance Sunday.

During the surprise visit, the royal pair joined families for a coffee morning at the community centre based at an Army housing estate to chat with those whose loved ones who work in the armed forces and have been deployed overseas.

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As they spent the morning mingling and playing with little ones, Meghan stopped for a chat with fellow parents, including mum Amy Thompson, whose husband Brad is attached to the Welsh Guards.

When she revealed what was said between her and Meghan, Amy hinted that Meghan had told her that baby Archie had started crawling.

“My daughter Aeris is the same age as Archie and we talked about weaning and the children beginning to crawl – she’s just a normal mum and it was like talking to a friend,” she explained.

In a sweet video shared on the @sussexroyal Instagram account, Meghan can also be heard revealing more about her little one’s development.

Complimenting a little girl on her teeth, she added that her own tot had begun teething.

“Archie just got two teeth – tiny ones right there,” she announced.