Brie Larson has been a standout on every awards show red carpet this season and style guru Joe Zee got the secrets behind her looks.

The Best Actress Oscar nominee stunned in a powder blue Atelier Versace gown for the Screen Actors Guild Awards last month, but fans might be surprised to know that the dress was picked the day of the show.

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"We literally tried on five dresses," Larson's stylist Cristina Ehrlich told Zee. "This was the first dress we tried on, and I had just seen it in Paris the Sunday before."

Because the dress was chosen so last minute, Ehrlich had to pull out a few tricks to get the dress ready for Larson in time.

"We were in the hotel right next to the elevator [working on the dress]," Ehrlich said. "We dominated their hallway. We set up a table. We literally had three different people sewing the details."

Larson's sparkly Calvin Klein gown at the Golden Globes was designed specifically for her and seemed to be a case of love at first sight.

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"When I was the most blown away was when I saw this beautiful gold thing that they had made," Ehrlich said, referring to a hoop that connected the dress around Larson's neck. "To wear a dress that's that heavy that's being supported by, like, a halter neck, it's a commitment."

The Oscars luncheon brought out a more casual side of Larson, who rocked a skirt with eyelash designs sewn on it.

"We were like, 'All eyes on Brie,'" Ehrlich explained. "That's where that came from."

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We can't wait to see what the Room star wows us with at the Oscars!

Don't miss ET's live Academy Awards pre-show on Pop this Sunday, Feb. 28., starting at 5 p.m. ET/2 p.m. PT. Go to PopTV.com to find out where to watch.