The Duchess of Cambridge took part in a relay race along with Prince William and Prince Harry on Sunday to support their charity Heads Together.<br /><br /> The three were joined by about 150 other runners who are training for the London Marathon at Queen Elizabeth Olympic Park in east London.<br /><br /> Athletes Iwan Thomas and Paula Radcliffe and presenter Sian Williams were also at the event.<br /><br /> Heads Together is a charity which is backed by the royals and aims to promote mental well-being in young people.<br />No Comment | euronews: watch the international news without commentary | http://www.euronews.com/nocomment/
