Jonathan E. Steinberg Creator, Writer Rick Riordan Creator, Executive Producer, Writer Walker Scobell Percy Jackson Actor Leah Jeffries Annabeth Chase Actor Aryan Simhadri Grover Underwood Actor Charlie Bushnell Luke Castellan Actor Jelena Milinkovic Nereid Actor Lin-Manuel Miranda Hermes Guest Star Ted Dykstra Augustus Guest Star Hiro Kanagawa Headmaster Guest Star Azriel Dalman Young Percy Guest Star Bert Salke Executive Producer Dan Shotz Executive Producer Ellen Goldsmith-Vein Executive Producer James Bobin Executive Producer Jeremy Bell Executive Producer Jim Rowe Executive Producer Jon Steinberg Executive Producer Monica Owusu-Breen Executive Producer Jet Wilkinson Executive Producer, Director Joe Tracz Writer Daphne Olive Screenwriter Bear McCreary Original Music Sparks & Shadows Music Pierre Gill Cinematographer