Ben Platt

Character: Amos Klobuchar

Molly Gordon

Character: Rebecca-Diane

Noah Galvin

Character: Glenn Winthrop

Jimmy Tatro

Character: Troy Rubinsky

Caroline Aaron

Character: Rita Cohen

Ayo Edebiri

Character: Janet Walch

Nathan Lee Graham

Character: Clive DeWitt

Owen Thiele

Character: Gigi Charbonier

Amy Sedaris

Character: Joan Rubinsky

Patti Harrison

Character: Caroline Krauss

Bailee Bonick

Character: Mackenzie Thomas

Kyndra Sanchez

Character: Darla Sanchez

Donovan Colan

Character: Devon Miller

Vivienne Sachs

Character: Lainey Fischer

Alan Kim

Character: Alan Park

Alexander Bello

Character: Sebastian Campbell

Luke Islam

Character: Christopher L

Jack Sobolewski

Character: Christopher S

Dean Scott Vazquez

Character: Toby Garcia

Quinn Titcomb

Character: Alice Taylor

Madisen Lora

Character: Franny King

Max Sheldon

Character: Salem

Tyrone Mitchell Henderson

Character: Devon's Dad

Priscilla Lopez

Character: Grandma Elizabeth

David Rasche

Character: Dr. Bill Rauch

Nicklas Shalin

Character: Boy Dancer 1

Emiko Diro

Character: Girl Dancer 1

Giada Leigh

Character: Girl Dancer 2

Zyla Harris-Petter

Character: Girl Dancer 3

Ceci Collura

Character: Jennica Simmons

Jonathan Lengel

Character: Bobby Kay

Olivia Puckett

Character: Wendy

Anthony Morabito

Character: Rotary Kid

Gavin Coleman

Character: Glenn's Tech Kid

Andrew Fetherolf

Character: Devon Dad 2 (uncredited)

Jonathan Iturriaga-DaSilva

Character: Tim (uncredited)

Susie Essman

Character: Woman in Hospital Bed (uncredited)