Emmy's 2012: Jimmy Kimmel Brings 'GMA' Behind-the-Scenes

We also found out -- this is big news, that jimmy is actually jennifer aniston's son. In a hilarious parody for smartwater. It's a new ad. And he's doing the emmy awards show. And nick watt captured... See More

We also found out -- this is big news, that jimmy is actually jennifer aniston's son. In a hilarious parody for smartwater. It's a new ad. And he's doing the emmy awards show. And nick watt captured him for a moment to chat about it all. Reporter: Not only is jimmy kimmel hosting the emmys sunday night, he's nominated. If you lose, if you lose, jimmy. The camera's going to be on you for the rest of the show and you're burning up inside. If I lose, I'm going to throw a tantrum, the likes of which you've never seen on television before. Reporter: Catering and swag for the post-awards ball is about the only thing kimmel hasn't stuck his oar in. You want some? Reporter: You think I'm a monster? He's e-mailing producers in the middle of the night. There's whispers, jimmy, you've been overly involved in every aspect. Really? Reporter: A lot of people are a bit -- I'm bossy. I don't know what I want to say. I'm the executive producer of my I'm used to being in charge. And sometimes it's hard for me to kind of back away from that. Reporter: Since jimmy calls all of the shots around here, and he and I are best buddies now, I got a second-row seat. Ladies? This morning, when you were rollinthe red carpet, i thought you were going to turn an ankle. That was dangerous. What if oprah was hosting the show? Would they have her kicking a red carpet for it? I don't think so. Reporter: Audi. Like the belly button. Reporter: This is the audi-sponsored green room. Going to see the guys from "dow abbey" going to be making out with sofia vergara. You would like that. You're one of the few that knows what they're saying on "downton abbey." I'm an american. Reporter: Who are you pulling for sunday night? As host, I like to remain moue tral. But bryan cranston is my son's little league coach. Reporter: You want to see him win? I do want to see him win. But I want to see me win. Reporter: Millions watching on tv. It will be a good warm-up for his biggest day. When it comes down for your wedding speech, it's going to be a piece of cake, right? It's funny. I'll be nervous about that, too. My fiance is the head writer on the show. I'm hoping she will write my vows for me. Reporter: Back to the green room tour. This table is where we keep betty white's teeth. Reporter: That's cruel. Is that all? Reporter: You said you didn't want to be nasty to people. I'm glad we had this conversation. Now, I know not ay that in the broadcast. ♪ Reporter: Sunday night, he won't pull a ric gervais golden globes shtick. Everybody asks me if I'm going to do it like him. And if I say I'm not, I look like some sort of coward. What's with all of the divorces? What's going on? This is a different environment. The golden globes are a fake award, decided by foreign bike messengers who come here. This is a real award. These are the emmy awards. Mom, can I go swimming? Reporter: And this is jimmy kimmel playing a small child, in jennifer aniston's sensationally viral water commercial. Why did you do that? I was having dinner with jennifer aniston. And she asked me if I would do it. I said okay. When you have a few drinks in you, you'll agree to almost anything. Reporter: No repeat of the pajamas from the nominations. Are you tying your own tux? No. Reporter: Really? My mom's going to do that for me. Reporter: For "good morning america," nick watt, abc news, los angeles. Terrific job, by nick watt. And of course, jimmy kimmel. The emmys red carpet live is a big special, sunday, 7:00, 4:00 pacific. And jimmy with the 64th annual primetime emmy awards. And join us monday for our big