The 13-year-old musician stopped by to chat with JJJ on the carpet, where he quickly told us where his loyalty lies in terms of the fame Harry Potter vs. Twilight debate.
“It has to be Harry Potter,” Greyson dished. “I love Harry Potter, it’s my favorite series of all time.”
Greyson is also pictured at the premiere of Judy Moody and the NOT Bummer Summer at ArcLight Hollywood on Saturday (June 4).