He hints so in an interview to MTV, where he also talks about his latest movie "Stuck in Love" (directed by Josh Boone).
“It was really great. The script is really great,” Nat said of auditioning for the lead role. “Josh Boone, who did ‘Stuck in Love,’ is directing the movie,I think I might—it’s still in negotiations—but I might be playing another role in the movie. [We're] still figuring it out.I’d love to be a part of it, just to work with Josh, and it’s a cool story.”
Personally, we think he'd be pretty perfect for the role.