Eugene Levy has said he deliberately avoided asking Prince William about Prince Harry and Meghan Markle during their filmed conversation at Windsor Castle.
The Canadian actor and comedian, 78, joined the Prince of Wales, 43, for the October 3 episode of The Reluctant Traveler.
Speaking after the episode was released, Mr Levy explained: "I was not told I couldn't ask anything, but it wasn't really, you know, up to me, to get into that.
"I had no interest in asking him about that, because it was, you know, a very delicate issue and certainly not up to me to get into it.
Meghan Markle and Prince Harry questions 'not off-limits' in Prince William interview
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"I think there were other things, you know, I could lead the conversation to that might be interesting for him and interesting for the world to hear."
He continued to tell ITV: "But that was something I wasn't necessarily interested in getting into."
The Prince of Wales spoke openly during the Apple TV episode, offering details about his children, reflecting on the cancer diagnoses of the Princess of Wales and King Charles, and saying he hopes to bring "change for good" when he becomes King.
In a separate interview with CNN, royal correspondent Max Foster asked Mr Levy if he expected the exchange to become so personal.
Eugene Levy and Prince William pictured at Windsor Castle
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Mr Foster said: "The tone was set in a way, wasn't it, by Prince William turning up on a scooter?
"You go on this tour, but it does take this turn, I'm not sure if you expected it to go there.
"He talks about being overwhelmed by the family stress, and then you go deep.
"You talk about the Princess's cancer diagnosis and how last year was the worst year of his life. Do you think he's changed, coming out of that?"
The royal also gave Mr Levy a tour of Windsor Castle during the episode that will be released on October 3
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The Prince of Wales discussed how much he misses his grandparents during a candid chat with Eugene Levy in a new episode of Apple TV’s The Reluctant Traveler | APPLETV+Mr Levy replied: "It changes what's kind of important, and he seemed to truly indicate that it did kind of alter his way of thinking."
Mr Foster added: "But quite profoundly, he said, 'Safe to say change is on my agenda,' when you were talking about the future of the monarchy. What do you think he meant by that?"
"My sense is that it may be speaking toward what will happen when he becomes King and what the tone of his monarchy will be like, and it might be something, the likes of something we haven't seen. The world hasn't seen," Mr Levy responded.