Margot Robbie is seen in a brown wig as she prepares to film scenes for an untitled project in LA

She’s gone to the dark side! Margot Robbie is seen in a brown wig as she prepares to film scenes for David O. Russell’s untitled project in Pasadena

Margot Robbie rocked a short brown wig after leaving a makeup trailer on set of director David O. Russell’s untitled project on Monday afternoon.  

Looking nearly unrecognizable with her new dark hair, the four-time Golden Globe winner, 30, sported a long black puffer coat and white sweatpants. 

She appeared in very high spirits, while sharing a laugh with John David Washington between filming scenes in Pasadena, California.  

Brunette bombshell: Margot Robbie wore a short brown wig after leaving a makeup trailer on set of director David O. Russell’s untitled project in Los Angeles on Monday

The Wolf of Wall Street star stayed cozy in a pair of charcoal grey slippers as she toted a large brown takeout bag.  

Meanwhile, Washington layered a down-stuffed Canada Goose jacket over a white thermal long sleeve and black trousers. 

Russell, the director of films such as Silver Linings Playbook, I Heart Huckabees and American Hustle, also penned the script for the motion picture. 

New look: Looking nearly unrecognizable with her new dark hair, the four-time Golden Globe winner sported a long black puffer coat and white linen trousers

New look: Looking nearly unrecognizable with her new dark hair, the four-time Golden Globe winner sported a long black puffer coat and white linen trousers

He’s loaded the project with an ensemble cast full of big names, as other performers cast in the movie include Robert De Niro, Chris Rock, Zoe Saldana, Rami Malek, Mike Myers, Anya Taylor-Joy, Timothy Olyphant and Alessandro Nivola, as well as Michael Shannon, Andrea Riseborough and Matthias Schoenaerts, Deadline reported last month.

Oscar-winning actress Jennifer Lawrence, who has collaborated with Russell on Silver Linings Playbook, American Hustle and Joy, is not linked to the project, as she’s currently making the movie Don’t Look Up.

Very little is known about the film aside from its all-star cast, and no plot details have been revealed. 

Happy: She appeared in very high spirits, while sharing a laugh with John David Washington between filming scenes in Pasadena, California

Happy: She appeared in very high spirits, while sharing a laugh with John David Washington between filming scenes in Pasadena, California 

Last month, Robbie slammed the Hollywood Foreign Press Association for their lack of black members, following Sunday’s 78th Annual Golden Globe Awards.    

In two Instagram Stories posts, the Australian actress, who was a presenter at the ceremony, implored the Association to make ‘real change.’ 

Alongside a headline referencing the diversity issue, she wrote: ‘Real change means not just standing on stage and saying it, but actually doing it. 

Opinion: Last month, Robbie took aim at the Hollywood Foreign Press Association for their lack of black members, following Sunday's 78th Annual Golden Globe Awards

Opinion: Last month, Robbie took aim at the Hollywood Foreign Press Association for their lack of black members, following Sunday’s 78th Annual Golden Globe Awards

‘We look forward to the Hollywood Foreign Press Association staying true to their promise.’ 

The Bird of Prey actress added the hashtag #timesupglobes, which was being widely.  

In a second Instagram Story, she shared a post from the Time’s Up organization, which read: ‘Hollywood Foreign Press Association. Not a single black member out of 87. Times up.’ 

Changes: In two Instagram Stories posts in late February, Margot addressed the Association, writing, 'Real change means not just standing on stage and saying it, but actually doing it'

Changes: In two Instagram Stories posts in late February, Margot addressed the Association, writing, ‘Real change means not just standing on stage and saying it, but actually doing it’