LOS ANGELES (AP) — Liz Sheridan, who played doting mom to Jerry Seinfeld on his hit sitcom, died early Friday. She was 93.

Sheridan died in her sleep from natural causes, five days after her April 10 birthday, said Amanda Hendon, her longtime representative and friend. She did not provide further details, including where Sheridan was living.

Her “Seinfeld” role as Helen was her best known but followed decades of work on stage and screen. In the 1970s, Sheridan appeared on Broadway in plays and musicals, the latter including “Happy End” with Meryl Streep and “Ballroom.”

“She was always very grateful to her fans and felt blessed to have enjoyed decades of work in the entertainment business,” including performing in her one-woman show, “Mrs. Seinfeld Sings,” Hendon said in a statement.

Sheridan had guest roles on TV series including “Kojak,” “Cagney & Lacey” and “Family Ties,” and played the pesky neighbor Raquel Ochmonek on “ALF” from 1986 to 1990. She was on “Seinfeld” for the show’s 1990 to 1998 run, playing opposite Barney Martin as her husband, Morty.

Another “Seinfeld” mom, Estelle Harris, died two weeks ago on April 2. Harris, who played hot-tempered parent to Jason Alexander’s George Costanza, also was 93.

As middle-class matron Estelle Costanza, Harris put a memorable stamp on her recurring role in the smash 1990s sitcom. With her high-pitched voice and humorously overbearing attitude, she was an archetype of maternal indignation.

Trading insults and absurdities with her on-screen husband, played by Jerry Stiller, Harris helped create a parental pair that would leave even a psychiatrist helpless to do anything but hope they’d move to Florida — as their son, played by Jason Alexander, fruitlessly encouraged them to do.