Looks like the kids at Hogwarts are immune to Bieber Fever.

“Harry Potter” star Daniel Radcliffe has confessed that until recently, he thought the 16-year-old fellow tween idol was a female.

"I only heard Justin Bieber for the first time two weeks ago," the Brit actor told MTV News. "I genuinely thought it was a woman singing. I'd never heard it before. Is it big in England yet?"

Twenty-year-old Radcliffe added that he prefers bands like Radiohead and Hope of States, and while Lady Gaga is “not my kind of music,” he thinks “she’s kind of amazing.”

As for the Bieber boo-boo, Radcliffe explained, “I'm so out of the loop when it comes to pop culture that I kind of don't even try anymore.”