Proud soldier Oliver Kenyon was among a select group chosen to join Prince Harry for a ceremony in London.
Air trooper Kenyon, aged 20, from Dronfield, was among members of the Army Air Corps invited to accompany the fourth in line to the throne.
Harry, a captain who served in Afghanistan as a co-pilot gunner on the air corps’ Apache helicopters, wore his military dress uniform to open the Field of Remembrance at Westminster Abbey.
Air trooper Kenyon, a former member of Dronfield Air Cadets who went to Henry Fanshawe School, told his family back home of the occasion - during which he managed to have a friendly chat with the prince.
Grandmother Kath Wray, who lives in Dronfield, said she shared her grandson’s pride.
She added: “He rang me and said, ‘Nan, it’s been absolutely amazing’. He said it was like speaking to a friend and that the prince was really natural. I was in tears.”
Mrs Wray added: “Oliver is to be part of Prince Harry’s old squadron and that’s what they chatted about. He is moving to Harry’s former base at Wattisham Airfield in Suffolk.”
Prince Harry was with his grandfather the Duke of Edinburgh at the Field of Remembrance ceremony.
Both men paid their respects by each laying a cross in front of wooden crosses from the Graves of Unknown British Soldiers.