Arthur

Jacob Ursomarzo

Lorraine (voice)

Kirsten Alter

D.W.

Christian Distefano

Mrs. Armstrong (voice)

Melissa Altro

Jane Read (voice)

Sonja Ball

Buster

Daniel Brochu

Rattles (voice)

Scott Beaudin

Kate Read (voice)

Tracy Braunstein

Marc Brown (voice)

Marc Brown

Molly MacDonald (voice)

Maggie Castle

Older woman (voice)

Corinne Conley

Bitzi Baxter (voice)

Ellen David

David Read

Bruce Dinsmore

Mr. Ratburn (voice)

Arthur Holden

Theodore Read (voice)

Roy Lewis

Arthur Read (voice)

Roman Lutterotti

Grandma Thora (voice)

Joanna Noyes

D.W. Read (voice)

Ethan Pugiotto

Chrissy Read (voice)

Sabryn Rock

Mr. Armstrong (voice)

Tony Robinow

Ryder Read (voice)

Luca Villacis

Slink (voice)

Michael Yarmush