The Game of Thrones star had to shave the left side of her head for her work as Cressida in The Hunger Games: Mockingjay movies.
"I'm a bit fluffy," she told me as she rubbed her head at the recent launch of Extremely Piaget and opening of the high-end jewelry house's Rodeo Drive flagship.
"They shaved my head every day, a clean shave," Dormer continued. "It was cold. I don't know if you guys remember the winter, but it was cold! Those polar vortexes! I was wearing my beanie a lot." (The 32-year-old stunner debuted the shaved look at the 2014 SAG Awards.)
Her daily Mockingjay ritual also included having makeup artist Ve Neill applying a temporary tattoo to her buzzed head and neck.
"[It's] not always what you want to happen to you at 5 a.m., but it looked super cool," Dormer said.
It was so cool, she wanted to keep it on after work hours. "I swore to everyone that I would because we finished filming in Berlin and I was like, 'I'm going to rock it in Berlin,'" Dormer said. "But I never got out. I never did. I missed an opportunity there…totally missed an opportunity, silly girl."
Dormer has already seen Mockingjay: Part 1.
"Are you ready for November 21?" she said with a big smile. "Man, I'm telling you. I'm so happy and proud to be a part of this incredible franchise."
Dormer is also attached to the upcoming Patient Zero and The Girl Who Invented Kissing with Zachary Quinto.
She is currently shooting the next season of Games of Thrones.
Watch: Natalie Dormer Shaves Head for "Mockingjay"