Sports-mad businessman Peter Phillips is the Queen's oldest grandchild and nephew of the new King. He is the son of Princess Anne and her ex-husband Captain Mark Phillips.
Peter has been described as "the Queen's favourite grandchild", according to the Express, though the reasons for are somewhat unclear. The Queen is said to have offered to Peter an honorary title when he was born, but the offer was turned down by his parents.
Peter was fifth in line to the throne at the time of his birth, though he is now 17th.