Sir Elton John thought "Bodyguard" was a "very sexy series" and knew Richard Madden would get his kit off on the show.
The 72-year-old singer was a huge fan of the BBC thriller, which starred Richard as PS David Budd, a protection officer in charge of looking after Keeley Hawes" home secretary character Julia Montague, and he predicted from the start that the pair would get jiggy with it.
While interviewing Richard for Interview Magazine, Elton said: "It was a very sexy series. As soon as I saw the first episode, I just knew you were going to fuck the home secretary.
"I said to David [Furnish, Elton's husband], "He's absolutely going to f**k her." "
At one point, Elton binge-watched three hours of "Bodyguard" in one night because he was desperate to finish the series before going away.
He added: "When I first started watching it, I watched an episode a night, and then I was going away for Christmas and thought, "I can't not see the whole thing."
"So I watched three hours. It was a riveting series that really catapulted you into another kind of stratosphere."
When asked by Elton if there was anything Richard would've changed about the series, he replied: "Oh, God, every day we had arguments. I f***ing hate compromise. Compromise is a word I cannot stand."
The "Game of Thrones" star admitted he's "still overwhelmed" by the success of the show, saying it was a "huge part" of his life.
He said: "I'm still overwhelmed, and also hugely grateful for it.
"Often, you work so hard on things, and then it comes out and people go, "Yeah, all right." And you go, "F**k, doing that nearly killed me. It took a huge part of my life out of me"."
Richard previously admitted stripping off for the show left him with fears he was projecting an "unrealistic body image".
He previously said: "We're projecting a very unrealistic body image. I find myself with actor friends - after we've done a kind of barely eating, working-out-twice-a-day, no-carbing thing for these scenes - looking at each other going: "We're just feeding this same s**t that we're against."
"I've done numerous jobs where you're told to lose weight and get to the gym. It doesn't just happen to women, it happens to men all the time as well."