Billie EilishinterviewedAriana Grandelast night after a screening ofWickedat the Directors Guild of Americas theater in Los Angeles.

The Q&A, held for Academy and guild members, saw the singers sharing their mutual fandom.

My team was like: Who would be a cool person to do this?

Billie Eilish and Ariana Grande

Billie Eilish and Ariana GrandeAxelle/Bauer-Griffin/FilmMagic; Dave Benett/Getty Images for Universal

Whos your dream person?

Grande explaining of the pairing (viaVariety).

I was like, Billie, [but] shes not gonna say yes.

But she said yes, and I was like, Oh, shit.

Now Im so nervous.

During the interview, Eilish asked about Grandes audition process forWicked, which was intense.

But, like, I was in all pink.

No one was hiding anything.

I just think that they were very thorough, so they had me do all of those multiple times.

And I remember I was like, Ive left everything else in this room.

You know what, Im gonna stick my lashes on the mirror.

And I just left them because they were poking up, because Ive been crying so much.

It was long and thorough as it should have been, because these roles have to be earned.

And we worked really hard and it was the most gratifying work ever.

And, yeah, its like, the right thing wont pass you by, you know?

I didnt even know you then, at all.

I was so excited.

What are [they] talking about?

Theres just absolutely no way that theyre singing live.

And I got scolded, and my friend was like, No, no, dude.

They are singing live and its amazing.'

The pair refused to sing in the moment, but Eilish confirmed, I would love to do that.

A sequel toWicked,Wicked: For Good, is set for released on Nov. 21.