Margot Robbie stuns in a plaid two-piece gown by Chanel at the SAG Awards in Los Angeles

   

She has been hot on the promotional trail for her latest movie, Bombshell.

And Margot Robbie looked every inch the Hollywood siren as she arrived at the 26th SAG Awards in Los Angeles on Sunday.

The Australian actress, 29, who received a nomination for Outstanding Performance by a Female Actor in a Supporting Role, wore a stunning ensemble by Chanel.

Stylish: Robbie stunned in a plaid two-piece gown by Chanel as she arrived at the ceremony

Check her out! Margot Robbie stunned in a plaid two-piece gown by Chanel as she arrived at the SAG Awards in Los Angeles on Sunday

The Hollywood star kept things conservative in the halterneck, floor-length number.

Margot was dressed by stylist Kate Young in a look straight from Chanel's Cruise 2019/20 Collection runway show.

As an ambassador for Chanel, Margot has worn the brand's dramatic couture gowns to the Oscars and Cannes Film Festival in the past.

Margot's gown was actually a two-piece set, estimated to be worth more than $18,500.

Hollywood glamour: Margot was dressed by stylist Kate Young in a look straight from Chanel's Cruise 2019/20 Collection runway show

Hollywood glamour: Margot was dressed by stylist Kate Young in a look straight from Chanel's Cruise 2019/20 Collection runway show

Glitz and glam! Margot accessorised with two Chanel necklaces, worth a combined $5,000

Glitz and glam! Margot accessorised with two Chanel necklaces, worth a combined $5,000

Natural beauty: She went for an understated makeup palette, consisting of defined brows, nude lipstick and luminous foundation

Natural beauty: She went for an understated makeup palette, consisting of defined brows, nude lipstick and luminous foundation

Hi there! The media personality appeared in great spirits as she greeted onlookers at the event

Hi there! The media personality appeared in great spirits as she greeted onlookers at the event

Warm greetings: The blonde beauty blew kisses at fans as she headed into the ceremony hall

Warm greetings: The blonde beauty blew kisses at fans as she headed into the ceremony hall

Nominee: Margot has been nominated in her category alongside Laura Dern (Marriage Story), Scarlett Johansson (Jojo Rabbit), Nicole Kidman (Bombshell) and Jennifer Lopez (Hustlers) 

Nominee: Margot has been nominated in her category alongside Laura Dern (Marriage Story), Scarlett Johansson (Jojo Rabbit), Nicole Kidman (Bombshell) and Jennifer Lopez (Hustlers)

Her matching blue plaid top and skirt alone comes to $11,500, while her lambskin belt is worth $1,680.

She accessorised with two Chanel necklaces, worth a combined $5,000.  

Meanwhile, Margot went for an understated makeup palette, consisting of defined brows, nude lipstick and luminous foundation. 

Margot has been nominated in her category alongside Laura Dern (Marriage Story), Scarlett Johansson (Jojo Rabbit), Nicole Kidman (Bombshell) and Jennifer Lopez (Hustlers).

Giddy: The screen star couldn't contain her giggles as she caught up with Sony Pictures' Thomas Rothman (R) and a pal

Giddy: The screen star couldn't contain her giggles as she caught up with Sony Pictures' Thomas Rothman (R) and a pal

A-listers: Margot posed for a cosy snap with Once Upon a Time in Hollywood co-star Julia Butters, 10 Gal pals: She also shared a hug with actress Allison Janney

A-listers: Margot posed for a cosy snap with Once Upon a Time in Hollywood co-star Julia Butters, 10 (L), before sharing a hug with actress Allison Janney (R)

Co-stars: The thespian warmly embraced Brad Pitt, who also starred in Once Upon a Time in Hollywood

Co-stars: The thespian warmly embraced Brad Pitt, who also starred in Once Upon a Time in Hollywood

Listening in: She squatted to the ground as she engaged in a chat with fellow Australian actress Nicole Kidman

Listening in: She squatted to the ground as she engaged in a chat with fellow Australian actress Nicole Kidman

Margot plays Kayla Pospisil, a victim of workplace sexual harassment, in Bombshell, which is about the downfall of Fox News chairman Roger Aisles. 

Earlier this month, Margot missed out on a Golden Globe Award in the same category, losing to Laura Dern for her role in Marriage Story.

Margot has also been nominated for an Oscar for her performance in Bombshell.