For 10 years, moviegoers watched as Daniel Radcliffe matured on film throughout eight Harry Potter films. But the 29-year-old recently revealed that he believes the bulk of his professional growth has occurred as a result of his Broadway stage work.

“It gives me a lot of confidence as an actor, which is not always something that I’ve felt,” Radcliffe told Variety. “I feel like doing theater ... it was really very important for me psychologically.”

Radcliffe starred in a number of films after Harry Potter and the Deathly Hallows: Part 2, the final film in the franchise, including The Woman in Black, Now You See Me 2, and Lost in London. His Broadway credits include Equus, How to Succeed in Business Without Really Trying, and The Cripple of Inishmaan.

“There’s something about doing it without an editor to save you, or a myriad of things in post-production that can help you out, something that made me go: ‘OK, I can act,’" Radcliffe continued. "I’ve grown a little bit as an actor every time I’ve gone back to the theater."

Radcliffe crediting his professional growth to working in theater may leave some Potterheads wondering if he thinks playing Harry Potter for so long held him back.

“Not professionally, at all,” he said. “There were moments when probably I coped with the personal effects of Harry Potter not as well as I could have. But professionally, no.”

According to Radcliffe, "There are directors that were, I think, excited to—I am quoting one of them here and I won’t say who—'reinvent' me.”

Radcliffe fans can gauge that reinvention for themselves with The Lifespan of a Fact, the new Broadway play starring Radcliffe, Bobby Cannavale, and Cherry Jones. It is running at New York City's Studio 54 through January 13, 2019.