King Charles and Johnny Cash.Photo: Rosanne Cash/Twitter

Johnny Cash King Charles

Rosanne Cashis sharing a never-before-seen photo of dadJohnny CashandKing Charles III.

On Monday, Rosanne, 67, posted the decades-old image of Charles, now 73, and Johnny, who died in 2003 at age 71,sharing a moment asthey stood together, looking off-camera.

“I’ve been debating all day whether or not to post this photo, but it’s just too good to keep under wraps,” wrote Rosanne, who posted the photo amidQueen Elizabeth’s funeral.

“I expect a lot of captions, but none I haven’t thought of already. But go right ahead,” she added.

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King Charles III.BBC America

Queen Elizabeth II Funeral - King Charles

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King Charles recently became monarch upon the death of his mother,Queen Elizabeth, who died at age 96on Sept. 8 at Balmoral Castle in Scotland.

For more on Queen Elizabeth’s funeral, listen below to our daily podcast PEOPLE Every Day.

RELATED VIDEO: King Charles Leads Procession toQueen Elizabeth’s State Funeral at Westminster Abbey

During the funeral, King Charles and his sons,Prince WilliamandPrince Harry, each appeared “deeply emotionally affected,” an onlooker told PEOPLE on Monday.

Lesley Garven MBE, manager ofthe Blind Veterans UK, said that the monarch and his sons appeared emotional during the services.

“They were obviously holding it together, but when you are so close to somebody you can really feel it and see it, and I think that was probably quite …it was human. It was real human feelings,” Garven added. “Being in there was quite up close and personal and intimate. And it was that whole feeling of, ‘This is somebody’s mother and grandmother.’ Below the pageantry, you could really feel it. The real, raw feelings of people.”

source: people.com