Liz Sheridan, a veteran stage and screen actress who played Jerry Seinfeld's mother Helen on "Seinfeld," died Friday morning, her manager and friend Amanda Hendon confirmed to CNN.
Hendon said Sheridan celebrated her 93rd birthday earlier this week. He is survived by his daughter and son-in-law.
Though she had dozens of film credits, she was best known as Seinfeld's doting mother on her titular sitcom, which ran for nine seasons. She also appeared in the alien-led sitcom "ALF" as snoopy neighbor Mrs. Ochmoneck.
A trained dancer, Sheridan made her Broadway debut in "Frank Meriwell" in 1971 and appeared in several more productions, including the 1977 Meryl Streep-starring musical "Happy End", mainly from the 1980s until The focus was not on film and TV.
Sheridan was also a writer who wrote the autobiographical "Dizzy & Jimmy" about her relationship with a young, ex-stardom James Dean, when the two were interested in a Broadway cast. At the time of her death, she was working to develop the book into a film, Hendon said.
Sheridan's death comes within two weeks of the death of fellow "Seinfeld" star Estelle Harris, who played George Costanza's mother on the series.