Megan Mullally pulled a Karen Walker on Thursday night, dishing out all the best celebrity guest star gossip from the Will & Grace set during her appearance on Jimmy Kimmel Live!

The 58-year-old actress visited the late night show to talk about the highly anticipated NBC reboot of her beloved comedy sitcom. She noted that in its nine seasons on the air, Will & Grace, had a handful of A-list guest stars, including Madonna, Cher, Matt Damon, Janet Jackson, Jennifer Lopez, Elton John, and more.

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One big surprise came when Madonna appeared on the show in 2003.

“We had a lot of other famous, movie star type of people but the pop stars were really interesting,” Mullally dished. “Everybody was really cool though. A lot cooler than you would think, like Madonna was very cool.”

The comedian added that Madonna was “really nice and really present,” saying the chart-topper was not a prima donna, despite her name’s implications.

“She didn’t necessarily know our real names in real life because why should she, who cares?” Mullally quipped. “Some of the cast were really offended, like, ‘She doesn’t even know my name!’ and I was like, ‘Who cares? Madonna’s doing our show! It doesn’t matter.'”

“So she’d be like, ‘Hi, Will, hi, Grace?'” Kimmel asked.

“Yeah, kinda, yeah, yeah, yeah, but in a nice way,”Mullally admitted. “She doesn’t need to know our names for crying out loud. She’s doing our show. Who cares?”

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