Kirsten Dunst

Silly

Lynn Redgrave

Celia

Julia Brendler

Claire

Trent Ford

James

Brent Carver

Porter

Alberta Watson

Fiona

Daniel Brühl

Jay

Peter Donaldson

Dr. Stone

Tara Rosling

Rose

Anthony Higgins

Adm. Griggs

Jessica Turner

Marta Griggs

Gerard Parkes

Uncle Peat

Richard M. Davidson

Young Peat / Voice of Malcolm (voice)

Alexa Gilmour

Franny

Mark Day

Tough Hal

Mary-Colin Chisholm

Beulah

Emma Smith

Silly - Age 3

Emma C. Bonang

Franny - Age 3

Molly Dunsworth

Silly - Age 6

Philip Arsenault

Peat - Age 6