Richard Madden has refused to confirm or deny his rumoured relationship with actor Brandon Flynn.
The Bodyguard star has become increasingly close to the 13 Reasons Why actor in recent months and the pair currently live together in Los Angeles.
Madden, 32, was asked by The New York Times if Flynn, 25, was his boyfriend, to which he replied: "I keep my personal life personal. I've never talked about my relationships."
The Scottish actor - who split from actress Ellie Bamber in December 2018 - was said to be "unbothered by the question but in no hurry to answer it."
Madden is currently starring in Elton John biopic Rocketman opposite Taron Egerton as Sir Elton's former manager and lover John Reid.
Flynn - who previously dated singer Sam Smith - recently set up a playlist dedicated to Madden since they became such close friends.
The Game of Thrones hunk also revealed his technique for avoiding the paparazzi since rocketing to stardom.
He explained: "I wear the same clothes days in a row, because if it looks like the same day, they can't run the pictures. There's only so many photos you can have of me with a green juice walking down the street."
Madden recently opened up about the gay sex scenes he and Egerton filmed for Rocketman.
He said: "Sex scenes are never fun to shoot but I only ever do these things if there's a real justification for them.
"This is the first time Elton ever had sex with anyone so that's why it's a relevant scene, in terms of his progression.
Keeley Hawes and Richard Madden attending a photo call for BBC One's Bodyguard at the BFI Southbank in London.
Richard Madden and Jenna-Louise Coleman arrive at the premiere of the third season of HBO's series, "Game of Thrones", on March 18, 2013 in Hollywood, California. Francis Specker /Landov
Richard Madden and Jenna Coleman backstage at the Glastonbury Festival, at Worthy Farm in Somerset.
Richard Madden and Jenna-Louise Coleman attend the UK Premiere of Disney's Cinderella held at the Odeon cinema in Leicester Square, London
Lily James and Richard Madden attend the UK Premiere of Disney's Cinderella held at the Odeon cinema in Leicester Square, London
Richard Madden (left) and Lily James during the filming of the Graham Norton Show at the London Studios in London, to be broadcast on BBC1 tomorrow.
Richard Madden at the 76th Golden Globe Awards during the red carpet arrivals held at the Beverly Hilton on January 6, 2019 in Beverly Hills, CA. (Photo by Sthanlee Mirador/Sipa USA)
Richard Madden at the 76th Golden Globe Awards press room held at the Beverly Hilton on January 6, 2019 in Beverly Hills, CA. (Photo by Sthanlee Mirador/Sipa USA)
Richard Madden with the award for best Drama Performance in the Press Room at the National Television Awards 2019 held at the O2 Arena, London. Photo credit should read: Doug Peters/EMPICS
Jamie Bell, Taron Egerton and Richard Madden (left-right) in the press room at the 72nd British Academy Film Awards held at the Royal Albert Hall, Kensington Gore, Kensington, London.
Picture Credit should read: Doug Peters/EMPICS
Richard Madden attending the Metropolitan Museum of Art Costume Institute Benefit Gala 2019 in New York, USA.Picture Credit Should Read: Doug Peters/EMPICS
Bryce Dallas Howard, Richard Madden and Taron Egerton at the Rocketman photocall, the Palais des Festivals, during the 72nd Cannes Film Festival. Photo credit should read: Doug Peters/EMPICS
Richard Madden (centre) and Taron Egerton and director Dexter Fletcher (right) attending the Rocketman premiere, held at the Grand Theatre Lumiere during the 72nd Cannes Film Festival. Photo credit should read: Doug Peters/EMPICS
NEW YORK, NY - MAY 29: (L-R) Actors Jamie Bell, Bryce Dallas Howard and Richard Madden on stage during The Academy of Motion Picture Arts and Sciences official screening of "Rocketman" at the MoMA, Celeste Bartos Theater on May 29, 2019 in New York City. (Photo by Lars Niki/Getty Images for The Academy Of Motion Picture Arts & Sciences)
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"It's as true to fact as we could be with where it happened, how it happened and when it happened."
Madden now warns his mother when to expect a raunchy lovemaking scene in his work after she was taken by surprise while watching him on TV.
He said: "I've made a few mistakes in my time, which is neglecting to tell my mother that there's going to be a sex scene in a show and then I get a kind of hysterical phone call of, 'You must tell me and your father! I was watching it at the time and my cup of tea, I nearly spilled it.' And then she covers her eyes.'
"She got a warning this time. 'She was told it was coming... not making that mistake again!"