Harry Potter Season 1's Budget Reportedly Surpasses Warner Bros.' Most-Expensive Adaptation

Published Oct 19, 2026, 8:19 AM EDT Rianna is the Movie News Editor for ScreenRant. After earning her BA in Film Studies, she began her career as an entertainment writer, contributing to several publications before joining ScreenRant. Her dissertation on the impact of streaming on traditional cinema sharpened her focus on the ever-evolving world of film and media. With 10 years in the industry, Rianna continues to cover the stories she loves while also advocating for awareness and representation of rare disabilities, such as Moebius Syndrome, which she lives with. HBO's Harry Potter is the most expensive trip to Hogwarts. In an enlightening report by The Times, HBO's adaptation of the beloved fantasy novels could eclipse the budgets of Warner Bros.' own adaptations of the Wizarding World. Harry Potter season 1's budget reportedly reached £150 million halfway through production, with more spending expected to follow. The most expensive, Harry Potter and the Deathly Hallows - Part 1 & 2, reportedly cost $250 million and had the highest budget, meaning HBO's adaptation could have surpassed that figure. More to come...