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Liz Sheridan, the witty and attentive actress who played the mother of Jerry Seinfeld’s character on "Seinfeld," has died just five days after her 93rd birthday, Fox News Digital has confirmed.

The longtime dancer and actress, who also made recurring appearances on "ALF," died peacefully in her sleep Friday morning, a close friend and rep for the veteran performer, Amanda Hendon, told Fox News Digital on Friday.

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Liz Sheridan Seinfeld

"The Stakeout" Episode 2: Michael Richards as Cosmo Kramer and Liz Sheridan as Helen Seinfeld. Sheridan, the witty and attentive actress who played the mother of Jerry Seinfeld’s character on "Seinfeld," has died just five days after her 93rd birthday. (Darius Anthony/NBCU Photo Bank)

Born April 10, 1929, in Rye, New York, Sheridan began her screen career in titles such as "The White Shadow," "Kojak" and "Gimme a Break!"

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She also appeared in dozens of episodes of "ALF" from 1986 to 1990. From the moment Sheridan was cast as Helen Seinfeld, fans of the series raved of her motherly charm and being hilariously overprotective of her son.

Liz Sheridan Seinfeld

Liz Sheridan as Helen Seinfeld and Jerry Seinfeld as Jerry Seinfeld. Born April 10, 1929, in Rye, N.Y., Sheridan began her screen career in titles such as "The White Shadow," "Kojak" and "Gimme a Break!" (NBCU Photo Bank)

Seinfeld shared a touching statement to Twitter addressing Sheridan's death on Friday, calling the actress the "nicest TV mom a son could wish for."

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"Liz was always the sweetest, nicest TV mom a son could wish for," he wrote. "Every time she came on our show it was the coziest feeling for me. So lucky to have known her."

Sheridan was also a prominent Broadway star, starring opposite Christopher Lloyd and a young Meryl Streep in the 1977 musical "Happy End."

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She famously dated late actor James Dean and penned a book about their romance, "Dizzy and Jimmy," which is currently in development as a feature film, Hendon revealed to Fox News Digital.

Liz Sheridan Seinfeld

"The Wizard" Episode 15: Jerry Seinfeld (left) as Jerry Seinfeld, Barney Martin as Morty Seinfeld and Liz Sheridan as Helen Seinfeld. (Joseph Del Valle/NBCU Photo Bank)

"Liz loved performing her one woman show ‘Mrs. Seinfeld Sings,’" Hendon relayed of the venerable actress. "Liz’s worldwide fan base will continue to enjoy her extensive body of work for years to come. She was always very grateful to her fans and felt blessed to have enjoyed decades of work in the entertainment business."

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Jerry Seinfeld and friend Larry David created "Seinfeld" over 30 years ago. It debuted on NBC July 5, 1989. Fans can still stream all 180 episodes of the beloved series on Netflix.

Described as the "show about nothing," "Seinfeld" follows four friends living in Manhattan. The sitcom was nominated for 68 Emmys, winning 10, and is widely regarded as one of the best comedies made to date.

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Sheridan is survived by her daughter and son-in-law.