Rose Byrne on her SAG ensemble

Rose Byrne arrives at the 18th Annual Screen Actors Guild Awards. Photo / AP, Matt Sayles

Australian actress Rose Byrne thinks her bob haircut is like "Scarface meets Anna Wintour".

The brunette star wowed at Sunday night's Screen Actors Guild Awards in a beaded white jumpsuit, teamed with simple accessories and a chic short do.

Although Byrne was sporting the edgier cut before the ceremony, she had it freshened up by celebrity stylist Harry Josh.

The stunning star has compared her new look to Vogue editor, Wintour, and Al Pacino's famed character in gangster movie Scarface.

"Just yesterday, he did another cut and he did the back and then he did the bangs again," she told People magazine.

"It's Scarface inspired. It's like Scarface meets Anna Wintour."

Byrne opted for an unconventional Elie Saab jumpsuit to walk the red carpet. The actress explained why she chose to wear the ensemble.

"I tried this on a couple of years ago," she said.

"I loved it for an event and it just didn't end up being the one that I wore. But I always had it in my mind."

Byrne's stylist Penny Lovell encouraged her to give the one-piece a go.

"[She] was like, 'How about that great jumpsuit we tried on from Elie Saab?"' she recalled.

"And I was like, 'Oh that? Let's go!' So that was it. I love jumpsuits."

- AAP