Season two of Percy Jackson and the Olympians has cast one of its key new roles.

Daniel Diemer will join the Disney+ series as Tyson the cyclops, a fan-favorite character from author Rick Riordan’s quintet of novels. Diemer’s casting was announced Thursday during a panel for the show at Comic-Con.

Season two of Percy Jackson, based on the second book in the series, The Sea of Monsters, is set to go into production next week in Vancouver. Diemer will be a series regular, joining stars Walker Scobell (Percy), Leah Sava Jeffries (Annabeth) and Aryan Simhadri (Grover).

Tyson is a young cyclops who grew up alone on the streets and finds it tough to survive in the human world. Shy, awkward and big-hearted, he’s also a child of Poseidon (Toby Stephens) — which means he’s Percy’s half-brother.

Season two of Percy Jackson and the Olympians will follow the young demigod back to Camp Half-Blood a year after the events of season one — and finds his world “turned upside down,” according to the show’s logline. “His friendship with Annabeth is changing, he learns he has a cyclops for a brother, Grover has gone missing, and camp is under siege from the forces of Kronos. Percy’s journey to set things right will take him off the map and into the deadly Sea of Monsters, where a secret fate awaits the son of Poseidon.”