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Awards season fashion continued to wow on the 30th annual Screen Actors Guild Awards red carpet Saturday night. 

Emily Blunt wore a bright red Louis Vuiton gown, with a plunging halter neckline that went all the way down to her waist. 

She accessorized the look with a stunning gold and diamond necklace from Tiffany & Co., according to People. She also sported sizable diamond earrings and a pair of gold cuffs on her wrists. 

Anne Hathaway wore a vivid blue Atelier Versace gown, with another plunging neckline, cinched in at the waist with a built-in belt.

Side by side photos of Emily Blunt in a plunging red gown

Emily Blunt accessorized her plunging red gown with a gold and diamond necklace from Tiffany & Co. (Getty Images)

Side by side photos of Anne Hathaway in a blue gown

Anne Hathaway wore a blue gown that many noted was inspired by the color cerulean, mentioned in "The Devil Wears Prada." (Getty Images)

EMILY BLUNT, MARGOT ROBBIE, KAIA GERBER BRING GLAMOUR AND RISQUÉ FASHION TO RED CARPET: PHOTOS

Blunt and Hathaway reunited on stage with their "The Devil Wears Prada" co-star Meryl Streep to present best male actor in a comedy series.

During their speech, they incorporated some of the movie’s most memorable lines, and many fans online noted that Hathaway’s dress wasn’t just blue, it was "cerulean," a reference to Streep’s iconic speech in the film.

Emily Blunt, Meryl Streep, Anne Hathaway at microphone on stage together

Blunt and Hathaway reunited with their "Devil Wears Prada" co-star Meryl Streep to present best male actor in a comedy series at the SAG Awards. (Michael Buckner/Variety via Getty Images)

The cast of "Modern Family" also reunited onstage, with Sofia Vergara and Julie Bowen appearing as style standouts.

Vergara wore a bold red strapless dress with a glittering skirt, while Bowen opted for a black, ruffled gown with portions of the dress appearing see through over her legs.

Julie Bown, Ty Burrell, Ed O'Neil, Sofia Vergara, Eric Stonestreet, and Jesse Tyler Ferguson on stage together

Julie Bown and Sofia Vergara wore standout looks during their onstage reunion with the "Modern Family" cast. (Matt Winkelmeyer/Getty Images)

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Margot Robbie went abstract for her latest "Barbie" inspired look, wearing an Elena Fishman black mini dress with a large pink sash draped over her shoulder and flowing off her hip down to the floor

Selena Gomez wore a white shimmering gown, made by Atelier Versace, that practically glistened on the red carpet. 

Reese Witherspoon wore a Haute Couture Elie Saab gown in red, with a structured bodice. 

Side by side photos of Margot Robbie in a black mini dress with a giant pink sash posing on the red carpet

Margot Robbie wore a black mini dress with a "Barbie" pink sash. (Getty Images)

Side by side photos of Selena Gomez in a white gown on the red carpet

Selena Gomez wore a glistening white gown for the SAG Awards. (Getty Images)

Side by side photos of Reese Witherspoon in a red gown on the red carpet

Reese Witherspoon wore a structured strapless gown for the award show. (Getty Images)

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Her pal Jennifer Aniston wore a slinky, silver gown by Celine, with a thigh high slit. Aniston also showed off a new haircut, and updated version of her famous "Rachel" cut from "Friends. 

Emma Stone also wore silver by Louis Vuitton, with hints of blue and purple in a feathery, crystal design swirling across the dress.

"Beef" star Ali Wong wore a the most scene-stealing look of the night, with a chandelier-esque gown that took up much of the carpet.

Side by side photos of Jennifer Anison wearing a silver gown

Jennifer Aniston sported a fresh haircut and thigh high slit on her dress for the SAG Awards. (Getty Images)

Side by side photos of Emma Stone in a silver gown

Emma Stone's silver Louis Vuitton dress had light blue and purple crystal details in a feather pattern (Getty Images)

Side by side Ali Wong in a chandelier like dress and a regular dress

"Beef" star Ali Wong wore a dramatic gown on the carpet, but ditched part of it once she was inside for the ceremony.  (Getty Images)

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Once inside, she opted to streamline and remove the large portion of the dress for the show and her eventual win for outstanding performance by a female actor in a television movie or limited series.