Alex Pettyfer keeps close to his leading lady Dianna Agron as they do an in-store signing at Hot Topic in Westfield Mall in Paramus, New Jersey on Saturday afternoon (February 4)

The I Am Number Four couple caught up with JJJ at the event and Alex, 20, had nothing but great things to say about costar Callan McAuliffe.

Alex shared, “He is also my best friend off the screen. He is the nicest man. He is so talented. I tried to take him to a baseball game, but he wasn’t interested in that. We went and watched movies though. He’s a great kid.”

Dianna also dished about Alex‘s singing ability — we wonder if a Glee guest spot is in the works…

FYI: Dianna wore a lovely Proenza Schouler dress, a scarf by Alexander McQueen and Lanvin booties. She completed her outfit with jewelry by Broken English.

10+ pics inside…