Michael Douglas makes an impressive revelation about his 101-year-old dad Kirk

Legendary actor Kirk Douglas still works out even at the age of 101, revealed his son Michael Douglas.

The younger Douglas told presenter Lorraine Kelly that his father wants to stay fit.

"He still has a trainer. He works out with a trainer at 101," the Romancing the Stone actor disclosed during the interview, a clip of which was posted to YouTube on July 18, 2018.

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He continued: "I remember when dad was 90 and he had a guy that he worked out with 30 years, Mike. So I went to see dad one day and I go, 'Dad, what's wrong? You don't look good.' He said, 'Mike died.' 'Oh dad, I'm so sorry. Mike died... how old was Mike? "He said, '94.' So his trainer was 94-year-old when he was 90."

Kirk Douglas is one of the last surviving stars of Hollywood's Golden Age. He rose to fame in the 1950s and 1960s, during which he starred in box-office movies.

He has been honored with an Oscar for Lifetime Achievement and the Presidential Medal of Freedom. As an actor, Kirk has received three Academy Award nominations.

He is also among the American Film Institute's list of the greatest male screen legends of classic Hollywood cinema.

Among his most successful movies were The Bad and the Beautiful, Lust for Life, Paths of Glory, and Spartacus.

The legendary actor survived a helicopter crash in 1991 and a stroke in 1996. He became a centenarian on December 9, 2016.

Michael also revealed that his father was also able to keep up with digital technology.

"The greatest thing that's happened for him is he's discovered FaceTime," he said. His father, he said, often calls on FaceTime to check on him.

Kirk became a great-grandfather when his grandchild, Cameron, welcomed his first daughter with his girlfriend in late 2017. Cameron is Michael's son.