What Maisie Knew

Julianne Moore

Susanna

Steve Coogan

Beale

Alexander Skarsgård

Lincoln

Joanna Vanderham

Margo

Onata Aprile

Maisie

Diana García

Cecilia

Sadie Rae

Zoe

Jesse Stone Spadaccini

Martin

Amelia Campbell

Ms. Baine

Maddie Corman

Ms. Fairchild-Tetenbaum

Paddy Croft

Mrs. Wix

Emma Holzer

Holly

Nadia Gan

Hostess

Breanna Lakatos

Samantha Buck

Zoe's Mother

Anne O'Shea

Administrator

Ellen Crown

Counselor

Jessica Miano Kruel

Customer

Malachi Weir

Manager

Zachary Unger

Freckly Boy

Thomas Pescod

Grey-Haired Guy

Arianna Shirak

Girl

Robert C. Kirk

LI Locksmith

Nate Lang

Lawyer

Shobhit Agarwal

NY Locksmith

Joel Marsh Garland

Emmett

Sean Gormley

Margo's Uncle

Luke Forbes

Musician on Bus

Henry Helemen

Tyler

Andrea Bordeaux

Waitress

Stephen Mailer

Zoe's Father

Harrison Nesbit

Pizza Delivery Boy

Evangelo Bousis

Photographer

Bruce Cannon

Puppeteer 1

Cinna Vesterberg-Rosa

Puppeteer 2

Valentine Aprile

Martin's Mother

Kevin Cannon

Susanna's Guitarist / Bandmate (uncredited)

James Colby

Byron (uncredited)

Henry Kelemen

Tyler (uncredited)