Kate Middleton confessed she's broody and that she "loves babies".
The Duchess of Cambridge doted over a baby during a visit to Cambridge with her husband Prince William.
While at the Newmarket Racecourse on Thursday, Kate looked delighted while holding the youngster.
A video of the moment shows the royal smiling at and chatting with the baby, and telling her mother: "I love babies."
The Duke of Cambridge was seen nearby watching his wife.
Kate spotted Marianne Provoost, who travelled from the Netherlands, and asked if she could hold four-month-old Norah.
Ms Provoost was heard telling the Duchess: "Enjoy your day and enjoy your children."
The video clip shows Prince William appear gently tapping Kate on the arm, saying: "It's time to go".
Royal fans took to Twitter to celebrate the sweet moment and joked about the Duke's reaction.
One wrote: "It’s making William a little nervous. He’s nervous with three. Another one might tip him over the edge."
Another added: "Poor William. He gets very nervous when Catherine starts getting broody."
A third said: "Look at William desperately telling Catherine it's time to go."
The pair were also seen enjoying some beer and playing football at Newmarket Racecourse as part of the Queen's Platinum Jubilee celebrations.
The couple appeared to be in a jovial mood as they attended the first-ever Cambridgeshire County Day.
The day of festivities, which included racing, performances and more than 100 stalls, saw thousands of people raise money for charity but it was Kate and Prince William who stole the show.
Kate, dressed in a patterned dress and nude wedges, was seen excitedly kicking a football at a target in front of impressed crowds. Before giving it a go, Kate told the crowd it would be difficult as she was “wearing wedges”.
After taking a shot, the Duchess shook the hand of a boy who had been playing before her and said: “You did better than I did.”
Not to be outdone, Prince William also bravely gave it a shot, despite donning a navy suit and suede shoes.
The pair were then seen sipping on a cold beer to cool off as they cheerily spoke to several stall holders, and also sampled chocolate.
The event included stands from 120 exhibitors from Cambridgeshire businesses, charity, community and public sectors.