Rick Riordan isn’t taking any chances this time.

The author of the Percy Jackson novel series, about a young man who discovers he is a demigod, wasn’t involved in the 2010 movie based on Percy Jackson and the Lightning Thief, the first book in his series, and that film received only middling reviews. (A followup film, Percy Jackson: Sea of Monsters was released in 2013, and also was not a critical success.)

For Percy Jackson and the Olympians, the Disney+ series based on his work, Riordan will be hands-on: He is a co-executive producer and wrote the script for the first two episodes with fellow executive producer Jon Steinberg (Black Sails, The Old Man). James Bobin directed the first two episodes of the show, which are expected to debut on the streamer on December 20th of this year.

The timing of the premiere date announcement and teaser release is not random: in the Jackson-verse, August 18th is Percy’s birthday.

The first season of Percy Jackson and the Olympians will follow the story of the first book in the series, The Lightning Thief. Percy Jackson (Walter Scobell) is just coming to terms with his newfound supernatural powers when the sky god Zeus accuses him of stealing his master lightning bolt. Now Percy must trek across America to find it and restore order to Olympus.

The series also stars Leah Sava Jeffries and Aryan Simhadri as Percy’s best buds, Annabeth Chase and Grover Underwood. The show’s Olympian guest cast also features Lin-Manuel Miranda as Hermes, Megan Mullally as Alecto/Mrs. Dodds, Toby Stephens as Poseidon, Jason Mantzoukas as Dionysus/Mr. D, Jay Duplass as Hades, Glynn Turman as Chiron/Mr. Brunner, Adam Copeland as Ares, Charlie Bushnell as Luke Castellan, Dior Goodjohn as Clarisse La Rue, Jessica Parker Kennedy as Medusa, Olivea Morton as Nancy Bobofit, Suzanne Cryer as Echidna, Timm Sharp as Gabe Ugliano and Timothy Omundson as Hephaestus.

The teaser begins Virginia Kull as Percy’s mother, Sally Jackson, telling her son, “the stories that I have told you about Greek gods and half-bloods — they are real,” as we see images of Camp Half-Blood, Percy on the elevator to Olympus, along with Ares and other monsters.

Disney+ will release a new episode from season one each week after the initial two premiere.