Harry Potter star Jason Isaacs says the films weren't "much fun to make" because "it's quite boring making big special effects films"

Jason Isaacs as Lucius Malfoy in Harry Potter and the Chamber of Secrets.

Jason Isaacs, who played Lucius Malfoy in the Harry Potter films, has shared his candid thoughts on filming the franchise.

"It's a terrible confession to make: they weren’t that much fun to make," he said on The One Show (H/T Variety). "It's quite boring making big special effects films."