During her guest appearance on The Ellen DeGeneres Show on Monday, the actress jokingly bragged about her tight-knit bond with the singer.
Witherspoon recalled her epic night at the 2020 Golden Globes, when she unashamedly asked Beyoncé and JAY-Z for some of their champagne.
"Well, I just noticed that they were having champagne and we had, um, run out of water at our table," she recalled. "So I was thirsty and so was [Jennifer] Aniston, who was sitting next to me. And I was like, 'Well, JAY-Z seems to have a giant bottle of champagne.'"
"He was like, 'Yeah, do you want some champagne?' I was like, 'Yes, I do.' Because clearly, he brings the good stuff," she added. "And then afterwards, he sent me a whole case of it!"
Witherspoon and DeGeneres then went back and forth, jokingly trying to decide who is better friends with Queen Bey and JAY-Z.
"She sent me clothes," Witherspoon said, referencing Beyoncé's Adidas x Ivy Park collection. "And then I was like, 'I think Ellen might like these,' and then she sent them to you. Because Beyoncé and I are really good friends. I mean, really, really good friends."
"In fact, you might say best friends," she added. "Some might say that."
Hear more on their friendship in the video below.