Lucy

Ksenia Solo

Claire

Maria Bello

Kerri

Mary Lynn Rajskub

Sylvia

Beth Riesgraf

Pietro

Enrico Oetiker

Hostess

Bárbara Bouchet

Young Lucy

Isabel Gravitt

Cosima

Nancy Cartwright

Placido

Paolo Bernardini

Cabiria

Andrea Osvárt

Catholic School Girl (uncredited)

Kim Evans

Big O Girl

Angela Nordeng

Receptionist

April Martucci

Robert

David O'Donnell

Clive Montgomery

Michael Wiseman

Dublonsky

Mike Falkow

Angelo

Lorenzo Balducci

Guido

Davide Devenuto

Gendarme

Francesco Foti

Young Kerri

Victoria Clare

Businessman

Branislav R. Tatalovic

Beppe Petruzzi

Bruno Zanin

Punched Boy

Shawn Weston Thacker

Sophia Loren (uncredited)

Daniela Delle Cave

Cardinal in Nightclub

Dan van Husen

Teen Claire

Morgan Wolk

School Boy (uncredited)

Ansel Carpenter

Big O Girl

Katelyn Causey

Japanese Interviewer

Mario Miyakawa

Big O Girl

Alyssa Suede

Gelsomina

Emily Dahm

Locker Room Girl (uncredited)

Jenna Kramer

Claire's Father

Denny Castiglione

Catholic Nun

Laura Allen

Walker

Rod Fielder

Businessman

Richard Doone

Catholic Boy

Vincent Shuster

Mario

Peter Arpesella