Liz Sheridan, who portrayed Jerry Seinfeld’s adoring mother on the popular sitcom, died early Friday morning. She had just turned ninety-three.

Amanda Hendon, Sheridan’s lifelong friend and representative, confirmed that Sheridan died peacefully in her sleep, five days after her birthday on April 10. She didn’t provide any other information, including Sheridan’s current whereabouts.

Her Helen role on Seinfeld may be her most well-known, but she had a long and varied career in theater and film prior to that. Sheridan had a number of Broadway appearances in the 1970s, including Happy End with Meryl Streep.

“She was always very grateful to her fans and felt blessed to have enjoyed decades of work in the entertainment business,” Hendon said in a statement.

Estelle Harris, another Seinfeld mom, passed away two weeks ago on the 2nd of April. Harris had played the role of a hot-tempered parent. She was also 93 years old.

Wedding Bell Blues, Forget Paris, and Legal Eagles, are just a few of the films in which he has acted. One of her last roles was in the 2010 television movie The Rooneys.

Her book, Dizzy & Jimmy, tells the story of Sheridan’s infatuation with James Dean, who was then unknown, in the early 1950s. As a nightclub dancer in NYC, Sheridan, or Dizzy, met Dean. His career took off after their breakup, with films like Rebel Without a Cause making him a star. At the age of 24, he died in a vehicle accident in 1955.

Sheridan got married to William Date Was, a jazz musician who died in 2003. She has left her daughter and her son-in-law behind.