Thelma

June Squibb plays Thelma, the titular character around whom the story revolves.

Fred Hechinger portrays Daniel, a character who interacts closely with Thelma.

Richard Roundtree is cast as Ben, adding a layer of experience and wisdom to the narrative.

Parker Posey plays Gail, a key figure in the unfolding events.

Clark Gregg takes on the role of Alan, providing significant contributions to the story.

Malcolm McDowell is Harvey, a character pivotal to the film's developments.

Nicole Byer appears as Rochelle, adding a unique presence to the cast.

Coral Peña plays Allie, contributing to the plot's progression.

Hilda Boulware is cast as the Woman at Post Office, a minor but notable character.

Chase Kim portrays Detective Morgan, involved in investigative aspects of the storyline.

Carol Cetrone takes on the role of Dancer, adding a distinct element to the film.

Sheila Korsi plays Gloria (also known as "Annie"), contributing to the unfolding plot.