Prince William moves in royal circles and many of his closest friends come from his time at Eton College and St Andrews University. However, during the course of his work he's made a fair few celebrity connections too, including a surprising friendship with 22-year-old Robert Irwin.
Robert, whose late father was the famous conservationist Steve Irwin, recently appeared on ITV's This Morning where he spoke about the "privilege" of striking up an unlikely friendship with Prince William.