We finally know when HBO's 'Euphoria' will head back into production. After a very long hiatus, filming on the drama's third season is slated to begin in January 2025 — just about three years after the premiere of season two. HBO says the whole principal cast is set to return, including stars Zendaya, Sydney Sweeney, Jacob Elordi and Hunter Schafer. An airdate hasn't been set, yet, but it's unlikely that 'Euphoria' will be ready to go before late next year, which would mean a gap of up to four years between seasons.