Logan Lerman as Percy Jackson

Brandon T. Jackson as Grover Underwood

Alexandra Daddario as Annabeth Chase

Jake Abel as Luke Castellan

Pierce Brosnan as Mr. Brunner / Chiron

Sean Bean as Zeus

Steve Coogan as Hades

Rosario Dawson as Persephone

Melina Kanakaredes as Athena

Catherine Keener as Sally Jackson

Kevin McKidd as Poseidon

Joe Pantoliano as Gabe Ugliano

Uma Thurman as Medusa

Julian Richings as Ferryman

Charlie Gallant as Lotus Land Bellhop

Alexis Knapp as Aphrodite Girl

Marie Avgeropoulos as Aphrodite Girl

Christie Laing as Aphrodite Girl

Luisa d'Oliveira as Aphrodite Girl

Crystal Tisiga as Aphrodite Girl

Marielle Jaffe as Aphrodite Girl

Annie Ilonzeh as Aphrodite Girl

Natassia Malthe as Lotus Land Waitress

Erica Cerra as Hera

Maria Olsen as Mrs. Dodds / Fury

Hector David Jr. as Lotus Land Dancer

Bonita Friedericy as Hysterical Woman

Elisa King as Aphrodite Girl

Tania Saulnier as Aphrodite Girl

Daniela Dib as Lotus Land Dancer

Chelan Simmons as Lotus Land Waitress

Andrea Brooks as Lotus Land Waitress

Jocelyn Ott as Lotus Land Waitress

Max Van Ville as Seventies Kid - Casino

Serinda Swan as Aphrodite

Dimitri Lekkos as Apollo

Ona Grauer as Artemis

Stefanie von Pfetten as Demeter

Conrad Coates as Hephaestus

Dylan Neal as Hermes

Luke Camilleri as Dionysus

Holly Hougham as Grover Girl

Raquel Riskin as Grover Girl

Yusleidis Oquendo as Grover Girl

Ina Geraldine Guy as Grover Girl

Janine Edwards as Grover Girl

Valerie Tian as Cute Girl

Violet Columbus as Nymph Warrior

Sarah Smyth as Pretty Girl #1

Merritt Patterson as Pretty Girl #2

Julie Luck as WGHP News Anchor - Video

Andrea Day as Field News Reporter

Maya Washington as Percy's Classmate

John Stewart as Poker Buddy

Matthew Garlick as Poker Buddy

Dee Jay Jackson as Poker Buddy

Stan Carp as Old Fisherman

Suzanne Ristic as Maid at Motel

Richard Harmon as Smart Ass Kid

Robin LeMon as Museum Tour Guide

Doyle Devereux as Museum Employee

Tom Pickett as Parthenon Janitor

Keith Dallas as Parthenon Janitor

V.J. Delos-Reyes as Parthenon Janitor

Spencer Atkinson as Parthenon Janitor

Tim Aas as Parthenon Janitor

Zane Holtz as 50's Tough

Eli Zagoudakis as Son of Ares

Loyd Bateman as Son of Ares

Matt Reimer as Son of Ares

Shawn Beaton as Son of Ares

Rob Hayter as Son of Ares

Jarod Joseph as College Buddy

Paul Cummings as College Buddy

Reilly Dolman as College Buddy

Julie Brar as Cute Girlfriend

Dejan Loyola as Boyfriend

Mario Casoria as Cook

Dorla Bell as Waitress

Carolyn Adair as Waitress with Cleaver

Jade Pawluk as Screaming Diner

G. Patrick Currie as Stuffy Croupier

Mariela Zapata as Warrior

Jaime M. Callica as Lotus Land Dancer

Sarah Francis as Lotus Land Dancer

Eddie Garcia as Lotus Land Dancer

Kenny Mugisha as Lotus Land Dancer

Jennifer Oleksiuk as Lotus Land Dancer

Izaak Smith as Lotus Land Dancer

Morgan Tanner as Lotus Land Dancer

Teya Wild as Lotus Land Dancer

Yannick Pudlorz as Warrior

Kenny Santiago Marrero as Bubble Man (uncredited)

Jay Williams as Lotus Land Dancer

Laura Jacobs as Aphrodite Girl

Ray Winstone as Ares (uncredited)

Ben van Diepen as Park Guest (uncredited)