Which actor played Jerry's mother Helen Seinfeld?

Liz Sheridan played Jerry's mother, Helen Seinfeld, on Seinfeld.

Sheridan appeared as Helen from the series premiere in 1990 through the show's finale in 1998. Helen was portrayed as protective, practical, and frequently exasperated by Jerry and Morty's behavior, especially their arguments over money, family obligations, and everyday etiquette.

The role became one of Sheridan's best-known performances, although television viewers may also recognize her as Raquel Ochmonek, the nosy neighbor on ALF. Sheridan's Seinfeld role is sometimes confused with Estelle Harris, who played George Costanza's mother, Estelle Costanza. Ann Morgan Guilbert played Jerry's aunt, while Annie Korzen appeared as Doris Klompus.

Sheridan was notable for appearing in all nine seasons of Seinfeld, making Helen one of the show's most consistently recurring family characters. She died in 2022 at age 93.