She completed the look with plaid trousers, also by Westwood, and chic Chanel black and white Mary Jane shoes.

As for accessories, she donned Chrome Hearts rectangle rimless glasses, and pearl drop earrings.

Billie Eilish gave fans a closer glimpse at the outfit she rocked to the 96th Oscars Nominees Luncheon in Beverly Hills, which took place on Monday

The star, 22, shared two new snaps of the look to her Instagram on Friday, as she showed off the elegant floral vintage Gucci headscarf she wore to the event

Billie attended the event with her brother and collaborator Finneas O’Connell, 26, who matched her in a plaid suit and a brown collared shirt.

The bash took place at the Beverly Hilton Hotel in Beverly Hills.

Billie and Finneas are nominated for an Oscar for their song ‘What Was I Made For?’, featured on the Barbie soundtrack.

Last Friday, the brother-sister act’s sentimental song was officially certified platinum in the US and the UK.

The superstar siblings won two Grammy Awards on February 4 and a Golden Globe Award on January 7 for the whispery track off the Barbie soundtrack.

Mark Ronson and Andrew Wyatt are also nominated in the music category for the movie, for their catchy tune ‘I’m Just Ken’, performed by Ryan Gosling in the film.

They will battle it out for the trophy at the 96th Academy Awards, which air March 10 on ABC.

Gosling and America Ferrera, both nabbed best supporting acting nominations for their roles as Ken and Gloria, though main star Margot Robbie, who plays Barbie, and director Greta Gerwig did not get nominated.

The brother-sister musical duo previously won the Oscar in 2022 for penning their whispery Bond theme, No Time to Die.

The star, who was styled by Andrew Mukamal, sported a Vivienne Westwood striped shirt and vest to the event; Seen on the red carpet on Monday

She completed the look with plaid trousers, also by Westwood, and chic Chanel black and white Mary Jane shoes

Billie attended the event with her brother and collaborator Finneas O’Connell, 26, who matched her in a plaid suit and a brown collared shirt

As for accessories, she donned Chrome Hearts rectangle rimless glasses, and pearl drop earrings

She was seen inside the event

Billie and Finneas are nominated for an Oscar for their song ‘What Was I Made For?’, featured on the Barbie soundtrack. The superstar siblings won two Grammy Awards for the track earlier this month; Pictured at the Grammys

The day prior to the event, Billie and her big brother were honored at the 39th Annual Santa Barbara International Film Festival, which was held at the Arlington Theatre in the seaside California city.

The Gucci brand ambassador repped the Italian luxury label once again in a brown quilted jacket over matching shorts, $220 ‘GG Cotton Socks with Web,’ and $1,150 ‘Women’s Loafer for Horsebit’.

Eilish wore glasses and covered her head in the $545 ‘GG-Print with Horsebits Silk Scarf’ emblazoned with ‘WAS’ above another set of words in red.

Billie and Finneas were honored with Variety Artisans Awards alongside Kazu Hiro, Rodrigo Prieto, Stephane Ceretti, Jennifer Lame, Holly Waddington, Michael Semanick, Ludwig Göransson, Sarah Greenwood, and Katie Spencer.