Kevin Bacon has revealed the secret to his long and successful marriage – dirty sex.

Bacon, who has been married to actress Kyra Sedgewick for 20 years, said that clean fights and dirty sex is what has kept them together for so long.

The couple spilled the beans as they arrived at the Screen Actors Guild awards with daughter Sosie, 16.

“You have to keep the fights clean and the sex dirty,” the Sun quoted Kevin, as saying.

His wife laughed and said: “I knew he was going to use that line.

"Come on, it’s the SAG Awards. You gotta blur the edges a little!”