Nat Wolff as Jack

Alex Wolff as Oliver

Paulina Singer as Violet

Nick Sandow as Ron

Polly Draper as Sally

Julia Abueva as Cassandra

Julia Macchio as Caitlin

Leo Heller as Shark Boy

Lisa Darden as Glinda

Patricia Squire as Sally's Mother

Will Cooper as New Agey Vet

Norm Golden as Neighbor

Kareem Williams as Party Goer

Alex DiMattia as Richard

Joshua Satine as Young Oliver

Simon Maxwell as Young Jack

Shawn Allen McLaughlin as Dad

Kelly Swint as Dancer #1

Adam Enright as Stage Manager

Christopher Halladay as Marty

Harriet Weaver as Caroline

Stella as Stella

Courtney Leigh Goodwin as Pedestrian (uncredited)