Story highlights David Cassidy is in intensive care with a breathing tube, publicist says

He was a superstar on the level of Elvis Presley and the Beatles

(CNN) David Cassidy, the wildly popular '70s heartthrob who shot to fame when he starred and sang in TV's "The Partridge Family," is in critical condition with organ failure.

Cassidy is being treated at a Fort Lauderdale, Florida, area hospital, longtime publicist Jo-Ann Geffen told CNN on Saturday. He is in the intensive care unit and has a breathing tube, she said.

David Cassidy in 1971

"He is conscious and surrounded by family and friends, nothing is imminent and we are taking it day by day," Geffen said.

She did not say what caused the organ failure.

Cassidy, 67, told People magazine earlier this year he was battling dementia

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