Margot Robbie Transforms from Blonde to Brunette for 'Z For Zachariah'

The newest Hollywood blonde has just dyed her hair brunette!

On Thursday, Margot Robbie made an important announcement over her Twitter account regarding her upcoming project "Z for Zachariah."

"Prep for Z for Zachariah is well and truly underway - I'm now officially a brunette and spent the day milking cows and driving tractors!" she tweeted.

The 23-year-old actress did not attach any photo to show off her newly dyed locks, but E! Online is already looking forward for her new look.

Over the weekend, the Aussie actress headed to her Down Under home for the premiere of "The Wolf of Wall Street" in Brisbane. She was so happy to be back home that she was all smiles when she did her red carpet walk for the Brisbane premiere.

"It doesn't matter if I'm coming here after eight months or days, I'm never happier than when I'm home," Margot told the press. "This is my hometown, this is the most important premiere of them all," she added.

Just a few days prior to her Aussie homecoming, Margot was doing the rounds in the awarding ceremonies in Hollywood, wowing the spectators during her red carpet appearance in the Golden Globe Awards.

Besides "Z for Zachariah," where she joins Chris Pine and Chiwetel Ejiofor in the cast, there are some more movies lined up for this young and upcoming actress. Margot is set to do the live-action adaptation of "Tarzan" opposite Alexander Skarsgard of "True Blood" as well as the movie adaptation of the WWII-era novel "Suite Francaise."

Margot was first known as Donna Freedman in "Neighbours" before leaving Australia to try her luck in the U.S. Upon entering Hollywood, she bagged the role of a flight stewardess in the short-lived TV series "Pan Am" and went on to do films like "About Time" and "The Wolf of Wall Street."