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A rep confirmed the news toDeadline.

Liz got her start in the industry in New York City as a nightclub performer.

Liz Sheridan on the phone

They were soon inseparable.

Together they hunted for jobs, haunted all-night bars, and diners, and fell in love.

Dean would die in a car crash during that ill-fated trip.

Ann Shedeen, Liz Sheridan and John LaMotta in Alf

Seinfeld superstar

Liz Sheridan would go on to score a pivotal character in her career in 1991.

She was cast as Helen Seinfeld, Jerry’s mother, on the NBC sitcom.

Helen was Jerry’s well-meaning but high-strung mother who always tried to mediate between any issues within her family.

Seinfeld cast.

I’m still a flower child somewhere.

You should not sit on the porch and just rock and grow old.

Liz Sheridan on the set of Alf.