Better late than never!
Per the Telegraph, Diana's will noted that the David and Elizabeth Emanuel-designed dress would be "looked after" by her brother, Earl Charles Spencer, until Harry's 30th birthday, which happens to be Sept. 15.
The voluminous dress, which is made of thousands of pearls and multiple layers of silk, has been part of an exhibition called "Diana: A Celebration" in the years following her tragic 1997 death. The gown, which features a 25-foot train, was displayed around the world, including a recent stint at the Cincinnati Museum Center.
Other objects from the exhibition will be turned over to her sons on Harry's 30th birthday. These include, per the Telegraph, 28 other dresses that belonged to Diana, two diamond tiaras, "other priceless family jewels" and family paintings. Even more valuable, though? The photos, letters and home movies the princes will reportedly receive from their late mother.
Harry is also expected to receive a reported £10million ($16.5 million) when he turns the big 3-0, just as William did two years ago when he hit the milestone birthday. This will be placed in a trust, just as William's inheritance was in 2012.