'Star Wars' Actors John Boyega and Daisy Ridley Explain Why They Call Each Other 'Peanut'

Daisy Ridley and John Boyega's friendship is in full force.

ET caught up with The Star Wars: The Force Awakens duo at the Force 4 Fashion fundraising event in New York City on Wednesday, where they revealed how their mutual nickname for each other came to be.

WATCH: John Boyega Still Hasn't Seen 'Star Wars: The Force Awakens'

"Oh! My peanut! Yeah, she's my peanut," Boyega adorably said on the carpet while talking about his chemistry with Ridley.

"Peanut! I call him Peanut, too," Ridley explained, giggling. "The thing is, I think it was me that invented it. But he would never admit that!"

"We just get on really well and we are really good friends," she added. "It's so great to experience this whole thing together."

Despite the fact that all of us at home have to wait two more weeks to see it for ourselves, Ridley reveals to ET that seeing the final version of the highly-anticipated film was "overwhelming."

WATCH: 6 Questions We Have After Seeing the New 'Star Wars' Trailer

"I'm still processing. It's quite overwhelming because I've never seen myself obviously properly onscreen like that," she reveals. "I'm looking forward to seeing it again after some time so I can take it in as a whole."

ET also caught up with Lupita Nyong'o at the event, who shared her opinion on playing the mysterious role of Maz Kanata in the continuation of the saga created by George Lucas.

"It's been a privilege to be a part of [the evolution of Maz Kanata] and I look forward to seeing the end result," Nyong'o says.

As we patiently wait for the movie to hit theaters Dec. 18, watch the video below to hear the six burning questions we had after watching the trailer.