Prince William had a surprise reaction when Prince Harry told him some “secret” personal news back in 2018.

The now-estranged brothers, along with their wives, attended Princess Eugenie and Jack Brooksbank’s wedding in Windsor on October 12, 2018.

During the day, Harry couldn’t contain his excitement and used the day to announce to his family that Meghan was pregnant with their first child.

Just five months after their own wedding – which took place at the same location in Windsor as Eugenie and Jack’s big day – Harry and Meghan revealed that they were expecting their first child – with their son Archie arriving just seven months later.

Taking to his bombshell memoir Spare, Harry recalled his brother’s surprising response to the news that he was set to become an uncle for the first time.

The Duke of Sussex recalled how he told William after a drinks reception in St George’s Hall when he and Meghan pulled him aside, as reported by the Mirror.

Harry wrote: “We whispered the news and Willy smiled and said ‘we must tell Kate’. She was across the room talking to Pippa. I said we could do it later, but he insisted.

“So we went and told Kate and she also gave us big smile and hearty congratulations. They both reacted exactly as I’d hoped – as I’d wished.”

Following Archie’s birth, the proud dad gave an interview outside Windsor Castle and said: “I’m very excited to announce that Meghan and myself had a baby boy this morning, a very healthy baby boy.

“I haven’t been at many births. This is definitely my first birth – it was amazing, absolutely incredible. I’m so incredibly proud of my wife. And as every father and parent would say, your baby is absolutely amazing.”