'American Idol' heartthrob Trevor Holmes and his girlfriend speak out

Holmes and his girlfriend, Sierra Nielsen, appear live on "GMA" after Holmes' "American Idol" audition stole the show and made judge Katy Perry swoon.
7:47 | 03/14/18

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Transcript for 'American Idol' heartthrob Trevor Holmes and his girlfriend speak out
showing up. I got to of course a question. Who is excited for "American idol," that it's back? If you have been watching one of the best moments is that so-called love triangle involving Katy Perry, a handsome conte contest contestant named Trevor and Trevor's girlfriend and now they're joining us live from L.A. Hello. Hi, guys. Good morning. The handsome couple. Big fans of the show. Thank you. You're right, handsome couple and, Trevor, I have a question for you. Oh, stop. You got the ticket to Hollywood. How have -- I did. How has the past 48 hours been? Man, it's been so surreal. You always dream about and it actually happens and I have to pinch myself every morning when I wake up because it still doesn't feel real. You got Sierra. She can pinch you too. She does. It's been pretty crazy. Walk us through the audition, Trevor. You're in that room. You admit you had a little crush on Katy Perry for a long time. Yes. So she starts flirting with you. What is going through your mind? It's funny. You know, everybody growing up, you have this celebrity crush that you never think you'll actually meet and under my circumstance, I had to go in and sing in front of her and, you know, to have her like -- I'm singing my heart out and she's flirting with me and I'm like, you can't put it into words. Just as important, Sierra, what were you thinking? I mean, I was fully supportive of it. We all have celebrity crushes but it was really funny because when they asked me to run in, I was just beelining because I was so excited and I had no idea I cut Katy off but -- We had so much fun and Katy and I hugged and we laughed about it. I even told her we could share him. You say that with such an innocent smile right there. I really didn't have any idea. I mean like we're outside and we can't hear anything that's going on. We could sort of hear he's singing and sang a second song about me which they didn't air and I knew and the producers are like the girlfriend is out here, I'm like, oh, god and then they asked me to go in and it was just a blur. I don't even think he knew what was happening. When Sierra walks in what goes through your mind? You had a moment there with Katy Perry. Yeah, well, so I mean -- he soy got my golden ticket and like the first thing I said, you're going to Hollywood and I actually go, like, are you serious? I am? They go, yeah and so I go, oh, my god and so I walk forward to get my ticket and I see Katy coming around to give me a hug and my mom and girlfriend are running in from the other side. I thought they were going to tackle me and knock me over. You're just filled with adrenaline. It's crazy. I could tell what was going through your mind but I can't use those words on TV. I tell you what, good luck. Good luck, good luck. We'll be watching, Trevor, Sierra, thank you so much. Thank you, guys. Thank you. Do not forget to tune in for more of "American idol's" return Sunday at 8:00 P.M. Right here on ABC. You guys. Now a great guest to bring to the table Oscar winning actress stars in the new "Tomb raider," please welcome Alicia vikander. ??? Hey. Here you go. Welcome. Thank you. Yeah, the European version is the double. Welcome back. Thank you. So as we mentioned you won an Oscar for "The Danish girl." I just read you actually don't have your own Oscar. Yes, it's been two years now of me saying that. Prosecutor it seems like people believe I'm bull -- I've been renovating my house and I'll soon take it home. It's my friend's daughter who has it in her room. She's keeping good care of it. I met her mom and she better send me another photo to make sure he's fine. Speaking of house you just got married. Congratulations. Thank you. We hear your husband is setting up home in Lisbon so will Oscar go to Lisbon. Yeah. What's home in Lisbon like and it why there. It's the most beautiful city and country. Great weather for someone who is Irish and Swedish. Very happy it's not raining. And, yeah, no, it's a great place where you can be close to nature. It's a city by the water if. It's a little different than where you're from but this movie is a departure from what we're used to seeing you in. Lara croft, "Tomb raider," love this movie. How is it for you? Did you always want to be an action star. To be honest I grew up in Sweden and I had -- my mom was an actress and probably introduced me to a lot ofeuropean art house cinemas and I've always been a kid and I still do, run to the cinema to see big adventure films and action movies and I was -- I mean, I was a huge fan of the Indiana Jones movies and the mummy series growing up. Did you ever think it would be you. Of course, not. No. I mean, like I said, I was brought up in a small country so probably I didn't think it was possible to work in English language growing up so it was another universe all the Hollywood films. Let's see you in action. I think we have a clip here. Aaagh. You've been working out to get in that role. Yeah, you know, now I've testimony doing press and looking at these clips and like images, oh, my god, I need to get back to the gym. It's all gone now. Did you get addicted to it. I mean it's very empowering because I kind of looked at a lot of female athletes and stunt women that I met over the yeabs in the film industry and I was like, well, if it's going to be plausible that Lara can do this because we did quite -- maybe a bit more naturalistic take then I want to look like these women who I so much looked up to. You're the embodiment of a cultural icon because now you have your own Barbie doll. Is that a little surreal? It is very surreal. I mean, it's -- but it's pretty cool. I didn't know but Barbie apparent apparentlile have a few cool female action or fictional characters over the years so I feel, you know, it's a great honor. This -- probably even further away of what I thought would be possible when I was a kid.

This transcript has been automatically generated and may not be 100% accurate.

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