Prince Harry showed off his playful side when talking about Prince Philip and Queen Elizabeth's marriage in a new BBC documentary Prince Philip: The Royal Family Remembers.
"He was doing all the flying himself, or certainly chunks of it," the 37-year-old said of his late grandfather, who was a qualified pilot. "When you’re flying, you don’t get an easy pass just for being the Duke of Edinburgh. You very much have to put in the work and prove your skill. But also he had an amazing privilege to get behind the controls and fly aircraft all around the world. I can just imagine my grandmother sitting in the back of a plane having a cup of tea, going through turbulence and going, 'Oh Philip! What are you doing?”’
The dad-of-two admitted he missed his grandfather's "sense of humor, but I miss him more for my grandmother because I know how incredibly strong she was with him there. I also know she will be OK without him."
"The two of them together were just the most adorable couple," he gushed. "To me knowing the cheekiness of him and knowing that behind what the world sees you have two individuals who were very much in love and both, from a very young age, have dedicated their life to service ... that is an incredible bond between two people."
The 95-year-old matriarch and Philip were married for 73 years.
Meanwhile, Prince William reminisced about Philip's fun side.
"He used to take the lid off and put it in your hands. And then he'd squish your hands together to fire the mustard onto the ceiling. He used to get into a lot of trouble from my grandmother for covering most of the places we had lunch and things with mustard on the ceiling," he revealed.
The film will debut in the U.K. on BBC One Wednesday, September 22, at 9 p.m.