When it comes to royal weddings, it’s a family affair. We’ve just learned that Prince Harry asked his brother William to be his best man at his upcoming wedding with Meghan Markle, announced by Kensington Palace.

William is returning the gesture, given that Harry was his best man at his wedding with Kate Middleton.

According to reports, nearly 600 guests have been invited to watch Harry and Markle’s wedding at St. George’s Chapel in Windsor. About 2,600 neighbors, staff and specially selected members of the public will get to greet the couple outside the chapel.