Adam Rich, best known for starring in “Eight Is Enough,” has died. He was 54.

The actor died Saturday at his Los Angeles area home, a family member confirmed to TMZ.

A photo of Adam Rich
“Eight Is Enough” star Adam Rich has died at the age of 54, a family member confirmed to TMZ. Getty Images

A cause of death has yet to be revealed but there was reportedly no foul play, a law enforcement source told the outlet, adding that Rich was found lifeless by an unidentified person who came to his residence.

Page Six has reached out to Rich’s rep for comment.

A photo of Adam Rich
He played Nicholas Bradford, the youngest son, on the popular TV series. Sygma via Getty Images

Born Oct. 12, 1968 in Brooklyn, New York, Rich rose to fame in the ’70s after portraying Nicholas Bradford, the youngest son of the Bradford brood, on “Eight Is Enough.”

The ABC show, which also starred Dick Van Patten, Lani O’Grady, Connie Needham, Grant Goodeve and more, ran from 1977 to 1981.

“I think he’s why the show was a big success,” Van Patten, who died in 2015, said of his former co-star in a 2011 interview with Stephen J. Abramson for the Television Academy Foundation.

“People loved him! [Fans] named a child Nicholas and everything because of him,” he added. “He was cute, and he was a good actor. He was very natural.”

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A photo of Adam Rich
“I think he’s why the show was a big success,” Rich’s former TV dad, Dick Van Patten, said in a 2011 interview.Getty Images
A photo of Adam Rich
Rich pictured here with fellow actor Mickey Rooney in the ’80s.Getty Images
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Rich’s other TV credits include “Code Red,” “Dungeons & Dragons,” “Small Wonder,” “St. Elsewhere” and “Baywatch.”

Outside of acting, Rich also made headlines over the years due to substance abuse struggles. He was arrested in 1991 for smashing a pharmacy window to obtain drugs – and was bailed out by his former TV dad, Van Patten.

Following years spent in and out of rehab, Rich was arrested again in 2002 on charges of driving under the influence after nearly striking a California Highway Patrol car. Per CBS News, Rich denied the charges at the time, telling reporters, “I’ve been sober for 10 years.”