Margot Robbie says she was 'dying on the inside' when 'hundreds of people' gathered to watch her and

• Margot Robbie talked about the viral "Barbie" set photos on "The Tonight Show Starring Jimmy Fallon."
• "I was like, 'This is the most humiliating moment of my life,'" she said.
• Robbie admits she had no idea the photos would become a viral sensation.

Margot Robbie and Ryan Gosling may have looked like they were having the time of their lives shooting a scene in Los Angeles earlier this year for their upcoming "Barbie" movie, but it turns out Robbie was embarrassed by it.

"I can't tell you how mortified we were, by the way," Robbie said on Monday night's "The Tonight Show Starring Jimmy Fallon." "We look like we're like laughing and having fun, but dying on the inside. Dying. I was like, 'This is the most humiliating moment of my life.'"

Robbie, who is also a producer on the Greta Gerwig-directed movie about the iconic doll, admitted to Fallon that she didn't think photos of her and Gosling in neon workout gear would become the viral sensation that they did.

"No!" Robbie said. "I mean, I knew that we had some exteriors to shoot in LA. I knew, OK, once you were doing exteriors, you're gonna get papped. There's probably going to be a little crowd of people who are going to stand out, because, you know, we stand out a little bit in those outfits.

"So I knew there was going to be a little bit of attention, and probably some photos would get out there, but not like it did. It was like, mad. It was like, hundreds of people watching," she continued.

"Barbie," which opens in theaters next year, stars Robbie in the title role as she embarks on an adventure outside of Barbie Land.

Along with Robbie and Gosling, the movie also stars Simu Liu, Will Ferrell, Michael Cera, Issa Rae, Kate McKinnon, and America Ferrera.

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