How did you feel about how Kill Your Darlings, What If, and Horns ended up doing at the box office?

DR: It is what it is. Kill Your Darlings did exactly what I expected it to do. A gay murder movie is never going to be, like, breaking box office records. And you know, it was an indie movie that was made for nothing, so there was never a pressure for it to do anything.

F Word, if it had been allowed to be called The F Word… I actually think the title change makes a huge difference. I think F Word is a fantastic title. I think What If is, you know, not a fantastic title. It's a title. It's fine. It's words. It's funny that kind of thing can make a difference.

You've got to bear in mind, like, those films all came at a time when people were like, "Can he even act? Will he even do anything after Potter?" And so those films did what I needed [them] to do. I was good in them, and they showed different sides of me. I can't control what happens at the box office. Frankenstein, I don't know if it's going to do anything. Who knows?

All I can do is do my best work in the movie that I can, and promote the hell out of it as much as I can. What people go and spend money to see is up to them. My friends have a great motto, which is, “I'd rather be nine people's favorite thing than 100 people's ninth favorite thing.” I feel like that's absolutely true.

After having spent so much of your life in movies that were engineered to make ungodly amounts of money, is there something nice about being in films that don't?

DR: That's the thing that everyone thinks. Like, "Surely, you want to match [Harry Potter]." It's like, nothing's going to match that. Like, Star Wars is going to match that, but nothing I'll probably do in the rest of my career is going to come close financially to that mark. So in a way, that's an incredible release of pressure. Because a lot of my friends are looking for that franchise, looking for that role. And I'm like, well, I don't have to do that.

In a 2013 New York Times Magazine profile about you by Susan Dominus, you said that there was at least a period after Potter where you had a chip on your shoulder about proving yourself as an actor. Do you still feel like you have that?

DR: I mean, I think I'll always have that a little bit. I think maybe it's a combination of various chips. Like, it's a bit of the, like, Child Star and He's Not Going to Make It Beyond That chip. There were a lot of people nearing the end of [Potter] that said I wouldn't have a career, that child stars are always doomed to fail. The way I see it, every single film I make, and every year I keep doing it, it's like proving them wrong for another year. The feeling of having shown someone to be idiotic in their opinion, when it's about you and negative, that never gets old. So I'll keep that chip.