James Gandolfini Loved…Green Day? “No Joke,” Swears Michael Imperioli

James Gandolfini is undoubtedly best known for his legendary performance as mob boss Tony Soprano on The Sopranos, but apparently he should be equally remembered for being one of Green Day‘s biggest fans.

This choice piece of information about the actor’s personal musical preferences comes courtesy of his HBO co-star Michael Imperioli, who played Christopher Moltisanti on the show. Imperioli posted a photo of himself and Gandolfini—who died of a heart attack in 2013—on Instagram on Thursday writing, “Jim and I at a fundraiser for my theater Studio Dante. Caesars Atlantic City 2005.” The actor was responding to fans in the post’s comments when he was asked, “What kind of music was Jim into?”