At first, the Duke and Duchess of Cambridge welcomed Prince Harry to Kensington Palace. Harry and his older brother, Prince William, have always been close, so it seems natural for Harry to share the expansive London estate that Will and Kate Middleton call home.
In late March, Harry, 27, moved his belongings out of Prince Charles' home and into a one-bedroom apartment in the main building of Kensington Palace. From there, it's only a short walk to Nottingham Cottage, where Will, 29, and Kate, 30, reside.
But Harry has been making a habit of barging in on the couple — who will celebrate their first anniversary on April 29 — whenever he feels like it.
"Harry's only been there a few weeks and he's already driving them nuts," discloses a close pal. "A few nights ago, he got home late and wanted to sit up and talk over several bottles of beer."
Kate has tried to be patient about the late-night visits but she's gotten fed up with all the brotherly bonding. Says the pal: "She told Wills he had to do something about his brother."
But it's hard to turn Harry away because he's been a little lonely since his 2010 breakup with Chelsea Davy. He's recently spent time with pop star Mollie King, and Will and Kate are hoping it gets serious... so they can get some peace and quiet.
FOR MUCH MORE ON HARRY'S DRAMA WITH WILL & KATE, CHECK OUT THE NEW ISSUE OF OK!, IN STORES NOW!