In fact, the “Magnum, P.I.”

“Mr. Selleck, you must step in and replace him,” Selleck remembered her finally saying.

As he recounts in his book: “‘I’m not cutting in on John Travolta!’

Split image of Tom Selleck and Princess Diana

was my reply, probably in too loud a voice.

She was not pleased.”

Selleck eventually agreed, taking Princess Diana’s hand in time for a slow song.

Prince Charles, Ronald Regan, Nancy Regan, and Princess Diana standing together at the White House

“She was very gracious and obviously had learned the skill of dealing with people and relaxing.

It was certainly memorable.”

And I wasn’t about to dip with Princess Di!"

Tom Selleck with Jillie Mack at the White House Gala Dinner in 1985

“She said that I was a big item in England, still.”

I don’t know how I could get there though,'" he recalled.

That was very flattering."

In his David Letterman interview, Selleck remarked on the quick turnaround time of his trip.

“All I had to do was fly for 22 hours on a weekend,” he said.