The Mistress of the Dark didn’t appreciate Galinda the Good’s shade.

Don’t look now, but a tragic allegation of witch-on-witch violence has emerged.

“She came and she brought 20 guests, she wanted 21 tickets,” Peterson continued.

Elvira and Ariana Grande

Elvira and Ariana Grande.Jerod Harris/Getty; Jamie McCarthy/Getty

Then I say to her, ‘Can we take a photo together?’

And she goes, ‘No, I don’t really do that.'"

Jerod Harris/Getty; Jamie McCarthy/Getty

A round of boos rose up from the audience.

Cassandra Peterson as Elvira, Mistress of the Dark

Cassandra Peterson as Elvira, Mistress of the Dark.New World/courtesy Everett

“I mean, come on,” Peterson snarked.

“Then she left before my show started!

All her relatives stayed, and she took off.”

Representatives for Grande and Peterson didn’t immediately respond toEntertainment Weekly’s request for comment.

On Monday afternoon, Grandeapologized to Peterson in an Instagram comment.

I resent their taking my product and doing that to it."

Peterson said of Nurmi at the time, “I’d like her to be friendly with me.

I don’t know why she has such hostility toward me.”

New World/courtesy Everett

Grande is gearing up to play one of the most recognizable supernatural characters in screen history.

Want more movie news?

Maguire’s reimagined Glinda who starts out as Galinda was first portrayed byKristin Chenowethon Broadway.

[This article has been updated to note Grande’s Instagram comment apologizing to Peterson.]