Naomi Watts as Rachel Keller

Martin Henderson as Noah Clay

David Dorfman as Aidan Keller

Brian Cox as Richard Morgan

Jane Alexander as Dr. Grasnik

Lindsay Frost as Ruth Embry

Amber Tamblyn as Katie Embry

Rachael Bella as Rebecca Kotler

Daveigh Chase as Samara Morgan

Shannon Cochran as Anna Morgan

Sandra Thigpen as Teacher

Richard Lineback as Innkeeper

Sasha Barrese as Girl Teen #1

Tess Hall as Girl Teen #2

Adam Brody as Male Teen #1

Alan Blumenfeld as Harvey

Pauley Perrette as Beth

Joe Chrest as Doctor

Stephanie Erb as Donna

Joanna Lin Black as Cashier

Michael Spound as Dave Embry

Art Frankel as Cal

Billy Lloyd as Darby Grasnik

Sara Rue as Babysitter

Keith Campbell as Ship's Mate

Ronald William Lawrence as Library Clerk

Lindsey Stoddart as Grad Student

Joe Sabatino as Orderly

Aixa Clemente as Nurse

Coleen Maloney as Mourner #1

Catherine Paolone as Mourner #2

Maura McNamara as Girl on Ferry

David Povall as Girl's Father

Gary Carlos Cervantes as Painter

Chuck Hicks as Ferry Worker