The actress was spotted rocking a new look on the set of her latest drama "Strangerland" in Sydney, Australia on Tuesday.
Sporting a much darker hair color and dressed in a denim button down shirt, the 46-year-old was a far cry from her usually glamorous self.
Kidman's latest thriller will follow a couple whose children go missing in a remote Australian desert, and their relationship is tested as they search for the kids.
"I am always looking for the right script to bring me home to Australia," the Nicole told The Hollywood Reporter in March.
"The moment I read 'Strangerland' I knew this was a film I couldn't say no to. I'm looking forward to working on a film in Australia, and I'm very excited to be working with Joseph Fiennes and Hugo Weaving."
The Sydney-raised beauty definitely doesn't have a problem when it comes to changing her looks for a role -- in "The Railway Man" which hits theaters this month, the actress dons a much shorter 'do with bangs. She also famously wore prosthetics in "The Hours."
What do you think of Kidman's makeunder? Tell toofab in the comment section below and see even more stars who've changed their looks for a role in the gallery above!