Chrissy Teigen says she took a glass of champagne out of Michael Keaton's hands at a party because she thought he was a server

• Chrissy Teigen said she once mistook Michael Keaton for a server after the Golden Globes.
• She recalled taking a glass of champagne out of his hands and thanking him.
• Teigen said her husband, John Legend, then told her, "That was Michael Keaton."

Chrissy Teigen said she once took Michael Keaton's glass of champagne out of his hands at an unspecified Golden Globes after-party, explaining that she thought he was a waiter.

The 35-year-old cookbook author told the story during a round of "Best Worst First," a game that provides prompts using a random topic generator, on Tuesday's episode of "The Tonight Show Starring Jimmy Fallon."

"Best celebrity encounter," the late-night host announced as the first topic.

Teigen answered by pointing to an interaction that happened after the Golden Globes one year, pausing to say the story might actually be her "worst" celebrity encounter.

"I was drinking a lot, and I saw somebody at the entrance holding a glass of champagne. So I just went up, and I took it and I said, 'Thank you,'" she said.

"John goes: 'That was Michael Keaton,'" Teigen added, referring to her husband, John Legend.

Fallon cut in, "It was not someone serving champagne?"

"No, it was not. And I'm so embarrassed by it still. I could die," she said. "I just took it, I drank it, and I left."

Though Teigen didn't specify which year the incident occurred, it was likely at the 2015 Golden Globes.

Keaton won best actor in a musical comedy or film for his role in "Birdman or (The Unexpected Virtue of Ignorance)" that year.

Legend and Teigen also attended the award show, as the singer won best original song for his track "Glory" in "Selma."

In December, Teigen said on social media that she was four weeks sober after her 35th birthday.

She said Holly Whitaker's book "Quit Like a Woman: The Radical Choice to Not Drink in a Culture Obsessed With Alcohol" helped guide her decision to stop drinking.

"One month ago, on my birthday, I got this book from my doctor and friend. I was done with making an a-- of myself in front of people (I'm still embarrassed), tired of day drinking and feeling like s--- by 6, not being able to sleep," she wrote on her Instagram story.

A little over a month later, Teigen said being sober had opened a "different world" for her.

Along with a picture of her family in Washington, DC, for the presidential inauguration, she tweeted: "Just incredible to be here. sober. I know that's weird but it's like...a different world for me."

She added, "Everything is new and better. very happy. the most happy bigly happy."