Transcript for Jake Gyllenhaal Gives Transformative Performance in 'Nightcrawler'
Jake gyllenhaal's new movie "Nightcrawler" hits theaters on Halloween a week from today. But critics are raving about his performance. Calling it transformative. He plays a stringer, a photographer who sells footage mostly to local news stations. I run a successful TV news business. We film breaking stories. Maybe you saw my item this morning, the fatal carjacking. No, I don't have TV. But that sounds cool. Do you have a cell phone? Yeah. Does it have gps? Yes, it does. Congratulations, you're hired. Okay. Oh, that was an interesting dynamic between the two. Welcome back here to "Good morning America," Jake gyllenhaal it's been a while. I was telling you, I didn't to want give up too much when I was talking to you before we started here. Okay, your character, Lou. Has issues. A little creepy. But you find yourself rooting for the guy. It's a success story. He's a stranger character, but it's a success story. It's about a guy who starts a company and it grows and grows and grows. That's the basis of the whole story. And I think that people are going to be shocked, but they're going to find a little bit of themselves in Lou. In some ways. In some ways. I think, yeah, there's an ambition to him. A drive to this character, getting the footage and build this company. It's something a lot of people relate to. And when you need to build a company and build something, that kind of ruthlessness is essential. It's a competitive world. It very much is. You were bummed out when a scene would end. Yeah. The writing in this movie is the best writing, really, I've got ton say. It's -- it's just so funny and sort of scary and brilliant. Dn Gilroy, who wrote and directed the movie wrote a brilliant screen play. I memorized the whole thing like a play. Every time we would finish a scene, I would be bummed because I didn't have the next night to perform in front of an audience. It was done. It was done an film. A lot of it was scripted. But I wanted to go back when I read that you didn't mean for this to happen. The mirror scene. It wasn't suppose to go as far as you did, just the moment hit you. We tried a lot of things. The character is funny at times and crazy at times. Try different things with speeches, and some scenes go really out of control. Other ones, keep it more tame. And I was in front of the mirror. And we were shooting in front of the mirror, brushing my teeth and combing my hair. And I decided to scream at the mirror in a fit of improve. I hit the mirror and it broke. That was that, and it's in the movie. Broadway debut, you must be excited about that. I am. I just saw my sister on Broadway last night in her show "The real thing." And he's incredible. It's pretty cool. I'm going ton Broadway too. We'll be on Broadway at the same time. I'm excited. It's "Consolations." It's a beautiful play. A love story. Wonderful. You're a beautiful man. Come on. Yes, you are. They didn't hit you too hard. You're a beautiful woman. So thank you. We're not supposed to say too beautiful because it's been played too much. We won't play that song right now. You're a great sport. And wish you the best. Thank you. And "Nightcrawler" opens nationwide on Halloween. It's perfect. That's Friday.
This transcript has been automatically generated and may not be 100% accurate.