Here’s everything we know about HBO’s Harry Potter remake. According to HBO CEO Casey Bloys, the Harry Potter series is still in early-ish development. If all goes to plan, we can expect the series to premiere sometime in 2026 or, more likely, 2027.Who is directing HBO’s Harry Potter remake? Arabella Stanton, Dominic McLaughlin, and Alastair Stout have been cast in HBO's Harry Potter reboot. Is there a trailer for HBO’s Harry Potter?