Percy Jackson

Logan Lerman

Grover

Brandon T. Jackson

Annabeth Chase

Alexandra Daddario

Tyson

Douglas Smith

Luke Castellan

Jake Abel

Hermes

Nathan Fillion

Clarisse La Rue

Leven Rambin

Chiron

Anthony Head

Gray Sister #1

Mary Birdsong

Young Thalia

Katelyn Mager

Gray Sister #2

Yvette Nicole Brown

Chris Rodriquez

Grey Damon

Gray Sister #3

Missi Pyle

Mr. D / Dionysus

Stanley Tucci

Thalia Grace

Paloma Kwiatkowski

Polyphemus / Laistrygonian

Robert Maillet

Tereus

Connor Dunn

Tereus

Connor Crash Dunn

Polyphemus (voice)

Ron Perlman

Reardon

Christopher Redman

Young Annabeth

Alisha Newton

Kronos

Robert Knepper

Young Grover

Bjorn Yearwood

Young Luke

Samuel Braun

Ganymede

Richard Yearwood

Oracle

Shohreh Aghdashloo

Martha

Octavia Spencer

Ichneutae

Jordan Weller

Harpy Barista

Camille Atebe

George (voice)

Craig Robinson

Barista - Hecatonshire

Anthony Shim

Cyclops #1

Derek Mears

Cyclops #2

Aleks Paunovic

Parcel Store Customer

Maxine Miller

Martha

Octavia L. Spencer

Shelly Johnson

Thor Freudenthal

Andrew Lockington

Michael Barnathan

Marc Guggenheim*

Matthew Armstrong

Chris Beach

Chris Columbus

Dan Hermansen

Ron Bartlett

Helen Jarvis

James Bolt

Chiron

Anthony Stewart