Welcome to Young Hollywood. com. Joe Leman for Young Hollywood and TV Guide Online here exclusively on the set for it's always sunny in Philadelphia. going to give you an inside look, the new season. What is this episode about?

Uh, this is a play called the nightman come. So we wanted to do a musical episode. So this is our answer for uh anybody who really cares about musicals. We present this.

When will it all pass? I'm going to bed over. So you can kiss my.

We're here with Charlie who plays Charlie in his fabulous yellow Charlie suit.

This is my suit that I wear in the play. Uh when I descend on the sun, I straped up there. I had a witchy witchy witchy. Am I woozy woozy woozy? Come and strike with this brush.

And what's it like working with Danny Deto?

He's the best. He comes in and he's always like, Charlie, I'm going to do this, I'm going to do that. and then he leaves and you know, he's a big star. He'll walk in the door, do his thing, walk out the door and you're like, was that Danny Deto? He's great.

And how did he get involved in this?

We went on our hands and knees and we begged him to be in the show.

You have some interesting habits on the show. Tell us about those.

Yeah, sure. I mean, I you know, I'm a little messy. Uh I sleep in a futon with Danny Deto, you know, who might be my father. Uh I huff glue, I can't read, I drink too much, but you know, nothing out of the norm.

We're here with Caitlyn Olson, very, very funny girl and very pretty princess. Tell us about your costume. What are you wearing?

Well, I'm wearing something that is incredibly flammable. Uh all I know for sure is that it does not breathe and that I am dripping sweat down my chest right now while we're talking. So.

Most men find me to be an eight or nine out of 10 and I'm available to any interested men. In today's episode, you guys are doing a musical.

We are. Uh Charlie writes a musical. It does have the song Dayman in it and it's the whole story of how uh the little boy becomes the Dayman and um we're all acting it out competing for who does a better job.

Glen, why are you embarrassed, really?

The truth is that I'm not embarrassed at all. I'm pretty proud of myself right now. You know, it's not often that I get to show myself off in spandex. And I always felt felt like that's a shame.

How do you get anything done when you guys are doing your improving? You're making each other laugh.

Sometimes it's tough to get through a take. Uh especially if somebody bust something out for the first time. You haven't heard it, you weren't prepared for it and you're just you know, can crack you up.

Fighter of the night then. Oh, champion of the sun. Oh, you're a master of karate and friendship for everyone. Dayman. Freeze. Don't say freeze. Huh? And cut. Yeah.

Hi Young Hollywood. This is Glenn Howarton from it's Always Sunny in Philadelphia. Got to watch season 4 of our show because it really is the funniest, most up crazy show on television.