NEWCASTLE, UNITED KINGDOM - FEBRUARY 21: Prince Harry joins team Heads Together runners at the Quayside for a marathon training session on February 21, 2017 in Newcastle, United Kingdom. (Photo by Chris Jackson/Getty Images)

NEWCASTLE, UNITED KINGDOM - FEBRUARY 21:  Prince Harry joins team Heads Together runners at the Quayside for a marathon training session on February 21, 2017 in Newcastle, United Kingdom.  (Photo by Chris Jackson/Getty Images)