fantastic new movie, "Dunkirk."

I saw it the other night.

You are fantastic, my friend. [ Cheers and applause ]

You were really good.

-Thank you very much. Thanks.

-And the movie itself is just --

I didn't know this story about Dunkirk.

I didn't know that it was --

-Yeah, it's a pretty crazy story.

I think the thing with it is there's no --

There's no, like, crazy back stories

to any of the characters, really.

I think they're a relatively blank slate.

And it means, when you're watching it,

you're kind of projecting your fear.

You're almost, like, watching them,

just imagining it as you, and it's, you know...

I found it very emotional, and I was in it, so...

-Yeah.

I mean, from all different angles

and aspects and different jobs, I got to say,

the cast was fantastic.

-The cast is unbelievable.

-Shout-out to the casting director.

[ Cheers and applause ]

The casting director is John Papsidera...

-John Papsidera.

-...who is -- man, oh, man!

I'm telling you, when you see a movie that has good casting,

I always go, "That is the greatest."

Because sometimes you see someone

that just takes you out of the movie.

This thing, I didn't know.

I just loved every single person.

I was like... [ Panting ]

And I saw it on a 70-millimeter projector.

-You were like what?

-[ Panting ]

I was in labor. I was in labor through half --

It turns out, it was the movie of the summer.

-It is. It really is a summer --

But it's, like, a -- it's a --

You just have to check it out.

I think I would go back and see it, as well, in IMAX.

-I have to say, you have to watch it in IMAX.

-Really? -Yeah, it's crazy.

-The thing I liked about it -- I saw it in 70 millimeter.

And you could hear the projector going like...

[ Imitates projector whirring ] -Yeah.

-So that was going... [ Imitates projector whirring ]

And I was going... [ Panting ]

-Well, you can hear all the IMAX cameras when you're filming.

They're quite loud.

-You can. -[ Imitates camera whirring ]

-Oh, of course, 'cause it's real film.

But, man, oh, man.

Christopher Nolan -- how is he?

Is he just a tricky guy?

-I mean, I'm such a fan of his. -Yeah, me too.

-And I'm such a fan of so many people working on this film,

and it just felt like such a...

I felt so lucky to be there, to be honest.

-Well, what a great story, and it's moving,

and I just didn't really know anything about it.

If you see it, it's basically, what the idea is,

these soldiers are basically trapped.

-Yeah.

-And the Germans are just killing them off, bombing them.

So what happens is, these people who have boats --

fishermen, local people from England who have --

they drive their own boats over to save the soldiers.

-Yeah, I think that's what makes it so...

-That's a little part of it, though.

-...so nice to watch is, it's kind of the opposite

to what a traditional kind of movie set around war is.

Not as being the heroes and kind of going and saving the day.

It's just about community, heroism,

and how these small acts from civilians

and the normal people who are at home,

coming to save us kind of together

makes this massive thing.

And I think it's very much about the spirit of people,

and, you know, how, when people come together,

you can do incredible things.

[ Cheers and applause ]

-We have a clip.

Here is Harry Styles' big-screen debut

in Christopher Nolan's period war drama, "Dunkirk,"

in theaters Friday.

Check this out.

-What's wrong with your friend?

[ Hatch squeals ]

-He's looking for a quick way out...

in case we go down.

♪♪♪♪

-Torpedo!

[ Explosion, men shouting ]

[ Cheers and applause ]

-Whoo! -Hoo!

-Whoo!

-Congratulations on the great reviews of the movie

and your own performance.

Harry Styles!