Hugh Jackman says doing all his own sex scenes is the "key to a good marriage".

Hugh Jackman and Deborra-Lee Furness

Hugh Jackman and Deborra-Lee Furness

The 47-year-old actor has been married to his wife, Deborra-Lee Furness, for the last 20 years, and joked one of the reasons is because he gets plenty of time to practice getting jiggy with it while shooting saucy scenes for his movies.

When asked by his 'X-Men Origins' co-star Ryan Reynolds whether he does all his own acting, Hugh quipped: "If there's sex scenes, I do them. [That's the] key to a good marriage."

Ryan - who has been married to Blake Lively since 2012 - agreed, and replied: "That's where the craft is."

During the comical interview, which occurred when Ryan hijacked one of Hugh's press junkets for his latest film, 'Eddie the Eagle', the 'Deadpool' star asked his fellow actor whether he ever ages.

Hugh replied: "Not since 2008."

The 39-year-old star then joked: "You are f***ing gorgeous!"

Hugh previously admitted his wife - who he met on the set of Australian drama 'Corelli' - is "the greatest thing" that has ever happened to him.

Speaking about when the pair first met, he said: "It gets better and better, I can honestly say that. She's the greatest thing that ever happened to me.

"She was the star and I had this major crush on her. Everyone did. The whole crew had a crush on her and I was so embarrassed by that, I didn't talk to her for about a week."