An 18th birthday mushroom trip brings free-spirited Elliott face-to-face with her wisecracking 39-year-old self. But when Elliott’s "old ass" starts handing out warnings about what her younger self should and shouldn't do, Elliott realizes she has to rethink everything about family, love, and what's becoming a transformative summer.

Maisy Stella

Elliott

Aubrey Plaza

Older Elliott

Percy Hynes White

Chad

Maddie Ziegler

Ruthie

Kerrice Brooks

Ro

Maria Dizzia

Kathy

Alain Goulem

Tom

Seth Isaac Johnson

Max

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