whose new NBC series, "Young Rock,"

premieres February 16th, at 8:00 p.m.

And joining us right now -- I'm very lucky --

is one of the actors from the series, Bradley Constant.

Bradley, there you are.

Thank you so much for coming on, bud.

You play young Rock.

You play Dwayne Johnson at 15 years old.

-[ Laughs ] Yeah. -Do you know --

I mean, you must have heard some of the stories.

But I know from some of the stories I've heard from Dwayne,

15, he's lived a pretty crazy life.

I mean, he was getting arrested.

I mean, he's constantly moving around.

I mean, crazy stories that you don't -- you have no idea.

-Yeah. -Dwayne, you remember

there was that one --

kids thought you were an undercover cop?

-Yes. When we were evicted from Hawaii,

we were forced to live, or go to, Nashville.

So, when I went to Nashville --

In the state of Hawaii, you can get your license at 14,

or at least you could back then, when I was a kid.

And so I show up in Nashville, driving a car,

full, full moustache, 6'4", 220 pounds.

The kids were in -- You know, I looked

not like too many people running around Nashville at that time.

So, "21 Jump Street" was a popular TV show

that was happening at that time.

Oh, for sure, they were like... -You're a narc.

-..."This is the real life -- We have the real-life

'21 Jump Street' happening in our school right now."

And Bradley has the opportunity, and he crushed it,

of playing me at 15, that undercover-cop time.

-Bradley, are -- are you -- were you ready to take on that role?

-Man, I was -- I was pumped.

I was extremely excited, yeah.

-Dwayne, we have a photo of you at 15 years old.

What do you remember about this guy?

-Oh, God. Don't do it.

[ Laughter ]

-Wow! That's 15? -That's 15.

And I'm clearly aggressive.

And I loved boom boxes.

And, you know, that was at the time

where I was getting in trouble,

trying to stay on the right path.

And, you know, Bradley, as you can see now,

has just such a great personality.

And he's so funny and charming, and he's a tremendous actor.

Even though our show is a comedy, you know,

he's got to step into those 15-year-old shoes

where I was a complicated kid

who was getting in trouble a lot.

But -- But also -- And this is what I shared

with Bradley is, man, I was getting in trouble,

I was getting arrested, I was --

We got evicted, I was angry that we got evicted,

I was angry that we were living paycheck to paycheck.

And I said, "But, Bradley," I said,

"If you can find that little voice

and little thing inside you

that allows you still to be a good kid."

And I said, "You know, because I was still

a good kid at that time.

I think he really, really crushed it.

-Here's a photo of me at 15 or 14.

That's me. [ Both laugh ]

-Is that is a mullet? Is that is a mullet?

-Yeah, it was -- -It is a mullet! Wait a second.

-It's kind of being a mullet a little bit.

It's a lot going on.

I don't know what hairstyle that is.

-And look how happy you are. Wait a second.

Are you -- Is this karaoke time?

-This is my house. We had --

My dad fixed some jukebox someone was throwing out.

I was doing -- either singing or doing stand-up or something.

And it looks like there's a pizza-delivery guy at the house.

I don't know why -- who that man is

with the red shirt and white pants.

[ Laughter ] But odd.

Anyway, that was a Friday night at the Fallon house.

I was probably doing something ridiculous.

But I was -- Oh, that's me --

All right, we can stop with the photos now.

This is just -- -Wait, wait, are you going --

Are you going to school? [ Laughter ]

-That is not a Halloween costume.

That is actually what I wore to work.

I got a job -- I got a job as soon as I could.

I can't believe they had that photo.

Gosh. -What were you doing?

Were you at a pizza joint? -[ Laughs ]

-I was an old -- looks like I was an old-timey bartender.

I don't know what I was doing. That was a --

-Ice-cream parlor or something.

-No, I was a bag boy at a grocery store.

I was the best. Uh, yeah.

If you -- People would request --

They would request me. They're like, "Get me Jimmy."

I was fast, and I would put eggs on top.

I knew how to do it, man. -That was my first --

one of my first jobs, too. I worked at a grocery store.

-Did you really? -Up until last year,

when I booked this, yeah.

-Bradley, where's your 15-year-old photo?

-Oh, goodness. -Didn't we drag one

out of Bradley's -- Yeah, ooh!

-[ Laughs ] -What's this guy?

What's this bit? -All right.

Look. Okay. So, 15-year-old Bradley.

I was -- I think I was trying to say,

"Hey, I don't have money, so don't ask me,"

so I had empty pockets and everything.

I was like, "Don't bother me." I don't know.

-Wait. That's your bit is to come in

with your pockets hanging out?

[ Laughter ]

-I don't know. I felt really cool

with that sweater, man.

Bamm-Bamm with a Louisville slugger, come on.

-Let me see that.

That's not even, like, the real --

Bamm-Bamm had white hair or blond hair.

-Look. -Yeah, that's like Blam-Blam.

-That's like Boom-Boom. [ Laughter ]

-Boom-Boom. [ Laughter ]

-That's fake Bamm-Bamm. Oh, my gosh.

Bradley, when you come on my show,

'cause I'm telling you right now, dude,

when you come on my show, 'cause I'm telling you,

I think you're gonna be nominated for an Emmy one day,

and when you do, you come on my show,

and you have to have the pockets out

and the Bamm-Bamm sweatshirt. [ Laughter ]

-I got it.

Don't ask me for money 'cause I won't have it.

[ Laughter ]

-Congrats on everything.

I want to show a clip of the show.

Here's a look at the premiere episode of "Young Rock."

Take a look at this, everybody.

-Anyway, best part is, Karen invited me to a party tonight.

So, life is good, huh? -It is.

-Well, it's not gonna last. Fine-ass Karen aside,

the reason why these girls haven't been giving you

the time of day isn't 'cause you look poor.

It's 'cause you look like an undercover cop,

like Johnny Depp from "21 Jump Street."

-No one thinks that.

-Dwayne, everyone thinks that.

-[ Whispering ] He's looking at me.

He's a cop, like Johnny Depp.

-I'm 15!

-You have a full moustache, and you're bigger than a dad.

You look like you work at an auto-parts store.

-Whatever, man.

None of that matters now that I got a girl into me.

-Yeah, but that girl thinks you're rich, and you're not.

-Dwayne Johnson and Bradley Constant.

"Young Rock" premiere February 16th

at 8:00 p.m., on NBC.

Daniel Kaluuya joins us when we come back.

Thanks so much, guys. I appreciate it.