“It was a very sweet thing,” the “Horizon” star said.
“I ultimately had a very sweet conversation about 15 years later with Prince William,” Costner recalled.
Getty; Filmmagic
The actor said he met with William when he was already spending time across the pond.

Kevin Costner and Prince William.Getty; Filmmagic
It was just us.
I’m sure there was somebody [outside], but just him and I met.
There was nobody else."

Princess Diana.Tim Graham Photo Library via Getty
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Costner declined to share further details about the interaction but reiterated that he remains quite charmed by William.
Tim Graham Photo Library via Getty
Costner previouslyspoke about theBodyguardsequel ideain 2019.
“She goes, ‘Are we going to have like a kissing scene?’
“Sarah was the one that set this up,” Costner told PEOPLE.
“Sarah was very cool, the duchess.
She didn’t do that all.
She [said], ‘No, I’m gonna make this happen.’
I always respected her, that she never inserted herself.”
Watch the full interview with Costner above.