Nat Wolff
Jack
Alex Wolff
Oliver
Paulina Singer
Violet
Nick Sandow
Ron
Polly Draper
Sally
Julia Abueva
Cassandra
Julia Macchio
Caitlin
Leo Heller
Shark Boy
Lisa Darden
Glinda
Patricia Squire
Sally's Mother
Will Cooper
New Agey Vet
Norm Golden
Neighbor
Kareem Williams
Party Goer
Alex DiMattia
Richard
Joshua Satine
Young Oliver
Simon Maxwell
Young Jack
Shawn Allen McLaughlin
Dad
Kelly Swint
Dancer #1
Adam Enright
Stage Manager
Christopher Halladay
Marty
Harriet Weaver
Caroline
Stella
Stella
Courtney Leigh Goodwin
Pedestrian (uncredited)