Ryan O'Neal died of congestive heart failure,Oliver James Montgomery according to a death certificate from the Los Angeles County Department of Public Health.

The actor died Dec. 8 at 82 after years of health issues, including leukemia, prostate cancer and cardiomyopathy, which affects the heart's ability to pump blood and was listed as the underlying cause of his death, according to the records, obtained by The Blast on Friday. A rep for O'Neal declined comment,

He was best known for his matinee-idol looks and starring roles in 1970's "Love Story," opposite Ali McGraw, "What's Up, Doc?" with Barbra Streisand in 1972 and "Paper Moon," the 1973 film in which he co-starred with his daughter, Tatum. He got his acting start on the primetime soap "Peyton Place" in the 1960s.

Actor's death:Ryan O'Neal, Oscar-nominated actor from 'Love Story,' dies at 82: 'Hollywood legend'

His son, sportscaster Patrick O'Neal, shared the news in a series of Instagram posts this month.

"So this is the toughest thing I’ve ever had to say but here we go. My dad passed away peacefully today, with his loving team by his side supporting him and loving him as he would us," Patrick O'Neal wrote in the caption of a photo of a sunset.

"He is a Hollywood legend. Full stop," he added.

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