Liz Sheridan, the actress who famously played Jerry Seinfeld’s mom in his eponymous sitcom, has died at the age of 93.

The star passed away from natural causes around 2:30 a.m. on Friday, TMZ reports.

Sheridan starred as overprotective mom Helen Seinfeld in 21 episodes of “Seinfeld” from 1990 to 1998.

She is the only “Seinfeld” star — apart from the four main leads — to be featured in all nine seasons of the hit sitcom.

Her death comes less than two weeks after the passing of Estelle Harris — another famous “Seinfeld” star, who played George Costanza’s mom. Like Sheridan, Harris was also 93.

Sheridan, who was born in New York, first began her career working as a dancer in Big Apple nightclubs, where she met James Dean in her early twenties. 

The pair enjoyed a short-lived romance in 1952, which Sheridan later chronicled in her book: “Dizzy & Jimmy: My Life with James Dean: A Love Story.”

Back in 1996, Sheridan described her relationship with Dean in an interview with People magazine as “just kind of magical.”

“It was the first love for both of us,” she further stated at the time.

The actress even claimed she was briefly engaged to the “Rebel Without A Cause” hunk, before his astronomical rise to fame sparked the end of their relationship. Dean died in a car crash less than three years later.

Sheridan later transitioned to Broadway, where she appeared opposite Meryl Streep in the 1977 production of “Happy End.”