Characters : Clarisse La Rue

Actor : Leven Rambin

Characters : Grover Underwood

Actor : Brandon T. Jackson

Characters : Luke Castellan

Actor : Jake Abel

Characters : Chris Rodriguez

Actor : Grey Damon

Characters : Thalia Grace

Actor : Paloma Kwiatkowski

Characters : Chiron

Actor : Anthony Stewart Head

Characters : Mr. D / Dionysus

Actor : Stanley Tucci

Characters : Hermes

Actor : Nathan Fillion

Characters : Cyclops

Actor : Derek Mears

Characters : Polyphemus / Laistrygonian

Actor : Robert Maillet

Characters : Polyphemus (voice)

Actor : Ron Perlman

Characters : Tereus

Actor : Connor Dunn

Characters : Young Annabeth

Actor : Alisha Newton

Characters : Young Grover

Actor : Bjorn Yearwood

Characters : Young Luke

Actor : Samuel Braun

Characters : Young Thalia

Actor : Katelyn Mager

Characters : Gray Sister #1

Actor : Mary Birdsong

Characters : Gray Sister #2

Actor : Yvette Nicole Brown

Characters : Gray Sister #3

Actor : Missi Pyle

Characters : Martha (voice)

Actor : Octavia Spencer

Characters : Reardon

Actor : Christopher Redman

Characters : Ichneutae

Actor : Jordan Weller

Characters : Harpy Barista

Actor : Camille Atebe

Characters : Barista - Hecatonshire

Actor : Anthony Shim

Characters : Kronos

Actor : Robert Knepper

Characters : Ganymede

Actor : Richard Yearwood

Characters : Cyclops #1

Actor : Derek Mears

Characters : Cyclops #2

Actor : Aleks Paunovic

Characters : Parcel Store Customer

Actor : Maxine Miller