Don Johnson thinks a good marriage will keep you young

He told People magazine: "A bad marriage will age you!"

The 'Miami Vice' actor - who has 41-year-old Jesse with his former partner Patti D'Arbanville, 34-year-old Dakota and his 39-year-old stepson Alexander Bauer with his ex-wife Melanie Griffith, and Atherton, 24, Jasper, 22, and 18-year-old Deacon with Kelly - heaped praise onto his "amazing" spouse, and said his six children also played a big part in keeping him in such good shape.

He joked: "Keep moving. How else do you think I have six kids? That I can name anyway."

Don provided an update on his children and said they were "doing alright".

He added: "They're all out of the house, but they always come back.

"Some of them never leave! And honestly, you don't want them to leave. At least I don't."

The 'Knives Out' star shared that spending time with his family was far more important to him than working, and so would often try to choose smaller roles to prioritise his loved ones.

He explained: "Work-life balance is an interesting thing as an actor because movies eat your life. Television shows eat your life.

"Luckily, I'm at a place where I can pick and choose roles, and sometimes I often prefer the supporting role because I still get joy out of what I do, but I don't always want to work those long hours and be away from my family."

Looking back at his time in the spotlight, Don admitted he found his fame to be overbearing, and pondered whether his struggles to being a public figure were similar to that of Elvis Presley's.

He lamented: "For a long time, I couldn't even go anywhere.

"I had to isolate. They know where you are. We had security 24/7.

"One day, I reflected on Elvis and thought, 'Isn't this kind of the way Elvis lived and died?' Not that I'm comparing myself to Elvis, but in terms of him not being able to have a personal life.

"So, I learned to manage it and vowed not to let it imprison me."