Prince William has opened up on a prank his late grandfather would pull which would annoy the Queen.
The Duke of Cambridge, 39, was paying a special tribute to the late Duke of Edinburgh for the BBC's upcoming tribute programme.
He revealed that his grandfather would get family members to hold a tube of mustard in their hands before removing the lid while they dined at Balmoral.
William recalled: "He would squish your hands together to fire the mustard up into the ceiling.
"He used to get into a lot of trouble with my grandmother for covering most of the places where we had lunch with mustard."
Peter Phillips and Zara Tindall also touched upon their grandfather's fondness for a mustard prank.
Zara added: "I can’t remember exactly what he says but he ends up slamming your hands together…. It goes all over the ceiling."
The programme features interviews with all of Philip’s kids and adult grandchildren. Originally, the documentary was set to be a celebration of his 100th birthday, which would have been in June.
However, the programme has since become a tribute following his death in April.
In his own tribute, Prince Harry, 37, described how he missed his grandfather. He said: "More than anything I miss his sense of humour. But I miss him more for my grandmother because I know how incredibly strong she was with him there."
Both William and Harry touch upon how both the Queen and Philip would seemingly enjoy it when things didn't quite go to plan on a royal engagement.
The Prince of Wales also added that his father tried to teach him to carriage drive, but this ultimately failed because Charles kept laughing hysterically.
Prince Charles went on to say how he remembered his dad watching him play football as a child.
He recalled how he would shout: "Stop scratching your backside and do something!"
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Prince Philip's sad passing came just weeks after he was reunited with the Queen following a month-long stay in hospital.
A statement said he died peacefully at Windsor Castle at the age of 99.
Dad-of-four Philip was the longest-serving consort in British history, dedicating decades of his life to royal duty, serving the nation at the monarch's side.
Prince Philip: The Royal Family Remembers is on BBC1 at 9pm tomorrowRead More Read More