Ben Platt as Amos Klobuchar

Molly Gordon as Rebecca-Diane

Noah Galvin as Glenn Winthrop

Jimmy Tatro as Troy Rubinsky

Caroline Aaron as Rita Cohen

Ayo Edebiri as Janet Walch

Nathan Lee Graham as Clive DeWitt

Owen Thiele as Gigi Charbonier

Amy Sedaris as Joan Rubinsky

Patti Harrison as Caroline Krauss

Bailee Bonick as Mackenzie Thomas

Kyndra Sanchez as Darla Sanchez

Donovan Colan as Devon Miller

Vivienne Sachs as Lainey Fischer

Alan Kim as Alan Park

Alexander Bello as Sebastian Campbell

Luke Islam as Christopher L

Jack Sobolewski as Christopher S

Dean Scott Vazquez as Toby Garcia

Quinn Titcomb as Alice Taylor

Madisen Lora as Franny King

Max Sheldon as Salem

Tyrone Mitchell Henderson as Devon's Dad

Priscilla Lopez as Grandma Elizabeth

David Rasche as Dr. Bill Rauch

Nicklas Shalin as Boy Dancer 1

Emiko Diro as Girl Dancer 1

Giada Leigh as Girl Dancer 2

Zyla Harris-Petter as Girl Dancer 3

Ceci Collura as Jennica Simmons

Jonathan Lengel as Bobby Kay

Olivia Puckett as Wendy

Anthony Morabito as Rotary Kid

Gavin Coleman as Glenn's Tech Kid

Andrew Fetherolf as Devon Dad 2 (uncredited)

Jonathan Iturriaga-DaSilva as Tim (uncredited)