"The first time I got recognized in public was at a movie theater. It was at the Lord of the Rings movie premiere," Franta told Trisha Hershberger at the Entertainment Weekly and PEOPLE Interview Stage at VidCon 2015.
"I was at the movie theater, and someone came up, and it was so weird to me, because I had never been recognized by a viewer, so I thought that was scary."
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"I did that for Harry Potter: I used to dress up," he revealed. "It was fun. It was the bomb. I loved it."
Yes: The same 22-year-old who recently announced he's written a book, launched his own record label, and released a music compilation earlier Friday, used to throw on black Hogwarts robes.