The New York-born star is said to have died of natural causes, TMZ reports. According to the report, Liz died “peacefully in her sleep” on Friday at 2:30 a.m., just five days after her 93rd birthday. She played the character of Seinfeld’s mother, Helen, on the show for the entire series from 1993 to 1998, which appeared in 21 episodes. Seinfeld’s mother dies at 93: Actress Liz Sheridan, who played Jerry’s mother in the hit series “Dies in her sleep from natural causes” Playing the very overprotective parent, Liz’s character was known for her crushing phrase, “How could anyone not like her?” He starred in the show with Barney Martin who played Seinfeld’s father, Morty. Thespida was also known for her role as Raquel Ochmonek in the ALF series which ran from 1986 to 1990 and appeared in 34 episodes of the series. Her film included small roles in Who’s That Girl (1987) starring Madonna and in Play the Game (2009). Mom and Dad: Starred in the show with Barney Martin as Seinfeld’s father, Morty (pictured above in a 2002 Denny’s commercial) The singer caused a stir with the romantic comedy Play the Game, due to the octagonal sex scene between her and Andy Griffith. Sheridan began his career in showbusiness in New York and the Caribbean, working as a dancer and singer in a nightclub, before moving on to the stage. He participated in Broadway productions during the 1970s, both in musicals and plays. During her time on the board, Sheridan co-starred with Meryl Streep and Christopher Lloyd in the 1977 musical Happy End. After that he moved to Los Angeles and started working in Hollywood, finding a supporting role in many TV movies of the prime time network. Classic: Playing the very overprotective parent, Liz’s character was known for her overwhelming phrase, “How could anyone not like her?” Another role: The Institution was also known for her role as Raquel Ochmonek in the ALF series which aired from 1986 to 1990 and appeared in 34 episodes of the series. Appeared in classic shows such as Kojak, Archie Bunker’s Place, St. Elsewhere, Newhart, Moonlighting, The A-Team, Who’s the Boss, Hill St. Blues, Cagney & Lacey, Family Ties and Murder, She Wrote. ALF was her first major role as the inconspicuous neighbor Rachel, putting her on the map as a trusted funny character actress. An acronym for “Alien Life Form” The NBC ALF show was a huge success for years. However, Sheridan really established herself in the television landscape when she joined Seinfeld, the show of the same name created by Larry David and Jerry Seinfeld. Widely regarded as one of the greatest and most significant comedy series of all time, the series ran for nine seasons and produced 180 episodes. Favorite: Sheridan will be unforgettable for the roles of Seinfeld and ALF Sheridan is the daughter of concert singer Elizabeth Poole-Jones and classical pianist Frank Sheridan. Her husband, jazz musician Dale Wales, died in 2003. The couple met in the Caribbean in Puerto Rico and were together from 1960 until his death in 2003. They were married in 1985. Before meeting her husband, Sheridan famously dated James Dean and wrote a book about their romance entitled Dizzy & Jimmy: My Life with James Dean: A Love Story. The book, which depicts their love affair in the early 1950s, is said to be in the process of becoming a feature film. Sheridan was left behind by her daughter, a photographer.