Transcript for Diego Luna Talks New 'Star Wars' Movie on 'GMA'
How you doing, man. Hey. Hi. Always good to see you. Very good. Good to see you. So we're talking about kids. You have a little boy. Little girl, right. I have both, yeah. I have the most beautiful boy and girl. They're 8 and 6. 8. Your little boy -- I'm sorry. You might be the second most beautiful, yeah. So your little boy got to see a piece of you. Yeah. In "Star wars." My boy is -- I mean, our whole relation has changed since this came out. Wow. Oh. I mean -- Because -- Hero. He's a huge fan of "Star wars" and when I told him he just went crazy, you know, it's like work normally used to separate us, you know, he hated my job. He was like, where are you going? Why for a month? Yeah, you crazy. You're going to leave me here. Yeah, dad, you got to go, right? 6:00 A.M. In the morning, what are you doing here? I mean, please behave. You know that kind of thing, when they're going to go to school it was the other way around. Make sure you do what the director says, be there on time. De get a chance to go on set or -- Yeah, they both went to set and it was beautiful because they came to the rebel station and it's an amazing set where you have all the ships and the people running around. And droids and -- It's a woman's dream. That's great. My son was just looking at that like this is paradise. Finally, I mean, we're never going to go back home, right, dad? Diego, I know your son is not alone. You grew up a giant fan and I love the story. Your first day. Yeah, of course. Thank you. Your first day on the set. You were probably as excited as your son, it sounds like. I arrived to London and the producer goes like oh, garret -- garret Edwards, go meet him, he's on the set. 'Doing a camera test and I arrive and he's like, welcome. We're going to have so much fun and he's in front of a monitor and then I started listening, And I went, oh, no. Oh. And I could see garreth's face and he had the same expression like we suddenly went to kids and we turn and there he is. Darth standing there like he's taller than you. You would feel terrible next to him and he's like there just -- He says, should I come in through the left or the right. Oh. You're doing a movie. This is fantastic. We had felicity Jones the other day. She said she did Kung Fu martial arts. You did military training for this. Yeah, my character is a captain, an intelligence officer so, yeah, I had to do a lot of military training to understand like how the mind of someone in the military works, you know, because I'm supposed to keep this team together through the mission and I know nothing about war, you know. Thankfully. It's a good thing, right. So I had to do a lot of research and it was a lot of fun. Also just the physical training to be able to do the stuff we made on this film because there was no like the double will do that. The double will do that. This was awe -- You got some injuries. Yeah, of course. I mean, it's a "Star wars" film. You want to go for it, right? Do you get a life sabre. No, I can -- the trailer -- we're rebels. This film is about -- it's the most grounded "Star wars" film. It's about the people. It's about heroes like you and I and, you know, like regular people doing extraordinary things. What it's saying is we can all be part of change and we could all make great things happen. A beautiful message. As a team and we're very powerful. So but since you're such a big fan and you've already shot this movie did you take anything with you to remind you? If you did, maybe you don't want -- Confession moment. You know what, I am Mexican. I want to be able to come back to this country. Don't tell on national TV I STE something. Oh, that's good. Thank you for coming in. Come back any time. "Rogue one" hits theaters
This transcript has been automatically generated and may not be 100% accurate.