Prince William was approached by a member of the public on Thursday who asked if he had forgotten his brother’s birthday. Prince Harry was quietly celebrating on Sept. 15 with wife, Meghan Markle, in the U.K. while mourning the loss of grandmother, Queen Elizabeth. The Sun reports that during a meet-and-greet with crowds at Sandringham on Thursday, an unidentified member of the public probed Prince William about Harry’s 38th-birthday celebration. According to The Sun, “William laughed to one well-wisher” and said “it is his birthday today, you’re absolutely right, it is.” Asked if he’d forgotten, the prince apparently “chuckled” and insisted: “No, I’ve not forgotten.” Rumors are swirling that the brothers are beginning to mend their fractured relationship after being seen side by side at several events at Windsor and Westminster Hall.