Shawn Mendes

Lyle (voice)

Winslow Fegley

Josh Primm

Javier Bardem

Hector P. Valenti

Constance Wu

Katie Primm

Scoot McNairy

Joseph Primm

Brett Gelman

Alistair Grumps

Ego Nwodim

Carol

Lyric Hurd

Trudy

Jason Kravits

Cy

Ben Palacios

Lyle's Motion Capture

Marc Farley

Animal Store Owner

Sal Viscuso

Judge

Adam Murray

Lowlife

Don DiPetta

Paramedic

Lindsey Moser

Wrestling Coach

Matthew Risch

Walkie Talkie Police Officer

Clayton English

Young Security Guard

Mac Wells

Show Security Guard

Jef Holbrook

Audition Stage Manager

Matthew Wilkas

Night Construction Worker

Lauren Boyd

Live Show Stage Manager

Evangeline Miller

Sweep Dancer

Jene Moore

Sweep Dancer

Angela Davis

HOA Member

Matt Rogers

Show Host

Taylor James

Judge

Al Thompson

Animal Control Officer

Keiko Bell

Court Spectator (uncredited)