UPDATE: Chrissy Metz is denying she called Alison Brie "such a bitch."

Celebrities on the red carpet usually fawn all over each other, but "This Is Us" star Chrissy Metz wasn't glowing about "GLOW" actress Alison Brie at the Golden Globes.

Metz's mic was still on when she called Brie "such a bitch" during the Golden Globes Facebook Live pre-show.

Metz had just wrapped up an interview with hosts Missy Pyle and AJ Gibson when Gibson asked, "Do you know a girl named Allison Brie?”

“Do I?” Metz said.

Gibson replied, “Well, I hear she’s at the other end of the carpet.”

The camera then panned away from Metz toward Brie, but her mic was still hot and she can be heard saying, "She's such a bitch."

It's surprising since the two were photographed looking friendly at last year's Screen Actor Guild Awards.