David Cassidy shot to super-stardom in 1970 as Keith Partridge on the TV series The Partridge Family. At 19, he became a teen heartthrob and his face adorned posters on millions of young girls’ walls and his fan club had more members than Elvis and The Beatles combined. By 21, he was the highest paid solo performer in the world.

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The singer, songwriter and actor shares what his life was like during those years.

“It was like being at the nose of a rocket ship,” the 66-year-old tells Dr. Phil in an exclusive interview airing Tuesday. “It was a magnificent time in America to be alive.”

WATCH: David Cassidy Opens Up About His Dementia Diagnosis

Hear more about Cassidy’s life during the five years while he was on the hit TV show in the video above. And on Tuesday’s episode, Cassidy opens up about his recent announcement that he is suffering from dementia. Check here to see where you can watch.

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David Cassidy Opens Up About His Past Binges With Alcohol