“I’ve always had kind of an obsession with memorizing complicated lyric-y intricate and fast songs,” Radcliffe told Fallon. And before you know it, the actor was in front of the live audience with mic in hand.

Of course, Daniel got a standing ovation.

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Carleigh Knight (left) and her sister, Natalie Rogovin, look at Christmas ornaments while shopping at Kudzu Antiques + Modern in Decatur on Tuesday, Nov. 25, 2025. (Natrice Miller/AJC)

Credit: Natrice Miller