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British RoyalsThe Duke of Edinburgh

Prince Philip’s grandchildren share their favourite memories of the Duke as they reveal his mischievous ‘mustard’ joke

Photo by The Countess of Wessex via Getty Images

Members of the Royal Family are sharing stories of their late patriarch, the Duke of Edinburgh, for a new BBC One documentary, and it turns out that one of his favourite games used to be squirting mustard on the ceiling with the help of his grandchildren.

In a clip released ahead of tomorrow night’s broadcast, the Duke of Cambridge shared how Prince Philip loved to squeeze a mustard bottle until it splattered on the ceiling—despite getting into trouble with The Queen for his antics.

“He used to take the lid off [the tube] and put it in your hands,” William recalled, “and then he’d squish your hands together to fire the mustard onto the ceiling.”

Zara Tindall corroborated the story, adding, “He gets you to hold it in your hands and I can’t remember exactly what he says – but he ends up slamming your hands together… it goes all over the ceiling.”

Her brother, Peter Phillips added that some old mustard marks are likely still visible on the ceiling.

William said his late grandfather was the heart of the family, and that “He enjoyed those jokes, he enjoyed messing around the children and being a grandfather.”

Prince Philip: The Royal Family Remembers will feature interviews with all of his children: The Prince of Wales, The Princess Royal, The Duke of York and the Earl of Wessex; and his adult grandchildren, from Peter Phillips to Lady Louise Windsor. The Countess of Wessex was interviewed, as were long-serving members of Prince Philip’s staff.

Prince Charles shared that his father turned barbecue into an artform, and Prince William said that his grandfather was cooking at every family barbecue he’d ever been to.

Princess Anne remembered fishing with her father, and how she couldn’t catch anything. “I always said I couldn’t catch anything and he said, ‘Nonsense come with me’, and after I’d been casting for about half an hour, he said, ‘I see what you mean.’”

And Peter Phillips shared how, whenever his grandfather got a new piece of technology, it was a chuckle to watch him figure out how to use it. “I have memories of him getting a new laptop or a new printer and hearing him shouting at it. He loved technology… but it was always quite entertaining to see him trying to figure them out!”

Some footage had been filmed prior to Prince Philip’s death, when plans were underway for the programme to be a part of his centenary birthday celebrations this past June. Following his death, interviews were recorded and reframed as a remembrance of his life.

Prince Philip passed away at the age of 99 on 9 April this year, two months shy of his 100th birthday.

Prince Charles revealed that one of his final conversations with his father was about putting together a centenary birthday reception. Prince Philip replied, “I’ve got to be alive for it, haven’t I?”

Prince Philip: The Royal Family Remembers will air on BBC One 22 September.

About author

Jess is the Senior Royal Reporter and Editorial Assistant at Royal Central. Her interest in royalty started in her teenage years, coinciding with The Queen's Golden Jubilee in 2002 and grew from there. She specializes in the British Royal Family (with emphasis on the Cambridges) and the Danish Royal Family, and has provided royal commentary for media outlets in Canada, the United States, the UK and Australia.