Suggestions by @anthonysan

Josh Hutcherson

as Jason Grace in Heroes of Olympus: The Blood of Olympus

Alexander Flores

as Leo Valdez in Heroes of Olympus: The House of Hades

Josh Hutcherson

as Jason Grace in Heroes of Olympus: The House of Hades

Asa Butterfield

as Nico di Angelo in Heroes of Olympus: The House of Hades

Graham McTavish

as Polybotes in Heroes of Olympus: The Son of Neptune

Keke Palmer

as Hazel Levesque in Heroes of Olympus: The Son of Neptune

Asa Butterfield

as Nico di Angelo in Heroes of Olympus: The Son of Neptune

Frank Welker

as Porphyrion in Heroes of Olympus: The Lost Hero

Idina Menzel

as Khione in Heroes of Olympus: The Lost Hero

Michael Ironside

as Ares in Percy Jackson

Darius McCrary

as Jazz in The Transformers

Brian Tyler

as Composer in The Transformers

Andy Pessoa

as Nico di Angelo in Percy Jackson

Ki Hong Lee

as Frank Zhang in Percy Jackson

Will Friedle

as Jason Grace in Percy Jackson

John Noble

as Kronos in Percy Jackson

Fred Tatasciore

as Zeus in Percy Jackson

Frank Welker

as Hades in Percy Jackson

Richard Armitage

as Poseidon in Percy Jackson

Nolan North

as Hermes in Percy Jackson