A tennis coach at the prestigious Queen’s Club in London, Lady Melissa Percy and her husband-to-be are part of an elite social group.
Thomas van Straubenzee, 30, is a chartered surveyor and is one of Prince Harry’s oldest friends.
Van Straubenzee was famously talking to Prince Harry on the phone when he was mugged in Battersea, south west London.
The concerned Royal dashed to his friend’s side and ended up giving a witness statement to the police after hearing the mugging take place on the other end of the phone.
He is also close to Prince William, the Duke of Cambridge, and was an usher at his wedding to Kate Middleton in April 2011 and the pair reportedly went to New Zealand on gap years together before university.
The Princes are also patrons of a charity set up in memory of Mr van Straubenzee’s brother.
Lady Melissa, known as Missy, 26, is best friends with Chelsy Davy, who will be her bridesmaid at the wedding onSaturday.
The couple have been courting since 2009 and were engaged in November.