A previously unseen photo of Prince William and Prince Harry is going on show for the first time.
The black and white portrait was taken in December 2006 at the Royal Military Academy, where the brothers trained.
Snapper Fergus Greer took the pic so it could be used for a tribute concert for William and Harry's mum Diana. But it wasn't released in the end.
The relaxed photo is being displayed at the National Portrait Gallery in London from Monday.