Details about their specific roles are not being released yet.
His parents are currently collaborating as jurors at the San Quentin Film Festival.
Parker is producing the project along with Sabina Friedman-Seitz (Atrabilious) and Cory Asinofsky.
Filming is due to get underway next month in New York.
Castillo will next be seen in Paramounts upcomingSmile 2and alongside Mark Ruffalo in HBOs untitled Brad Ingelsby series.
Castillo is repped by CAA, JWS Entertainment, and Goodman, Genow, Schenkman.
William Atticus Parker is repped by CAA and Untitled Entertainment.
