Billie Eilish makes red carpet debut with new boyfriend in duvet, PJs and an eye mask

Billie Eilish and her new boyfriend Jesse Rutherford made their red carpet debut as a couple on Saturday. (Getty Images)
Billie Eilish and her new boyfriend Jesse Rutherford made their red carpet debut as a couple on Saturday. (Getty Images)

Billie Eilish walked the red carpet at a glamorous Hollywood event on Saturday wearing a duvet, pyjamas and an eye mask.

The singer, 20, opted for a more relaxed look while attending the 11th Annual LACMA Art and Film Gala in Los Angeles with her new boyfriend.

She was pictured wrapped in a monogrammed Gucci duvet alongside 31-year-old singer Jesse Rutherford.

At one point, the couple flung off the luxury blanket to reveal matching silky nightwear by the same high-end fashion brand.

The singer attended the star-studded event with her new boyfriend Jesse Rutherford. (Getty Images)
The singer arrived at the event with her new boyfriend Jesse Rutherford. (Getty Images)
The couple were dressed in matching Gucci looks. (Getty Images)
The couple were dressed in matching Gucci looks. (Getty Images)

Eilish's ensemble featured an eye mask, lace-trimmed pyjama slip dress and dressing gown, as well as gloves and tights – all bearing the iconic Gucci logo.

She posed alongside Rutherford, who was wearing a pyjama top and trousers in the same silky fabric, as well as a pair of slippers.

Read more: Billie Eilish talks about her evolving sense of style

It was the couple's red carpet debut together after they reportedly first started dating last month.

While they appeared to – albeit very stylishly – dress down for the evening, others in attendance at the star-studded event pulled out all the stops.

Heidi Klum stepped out in purple sequins. (Getty Images)
Heidi Klum stepped out in purple sequins. (Getty Images)
Paris Hilton also opted for some sparkle with her cut-out black dress. (Getty Images)
Paris Hilton also opted for some sparkle with her cut-out black dress. (Getty Images)

They included Heidi Klum, who opted for a floor-length dress made from purple sequins, which she accessorised with a red clutch, manicure and heels.

The model, 49, appeared to be embracing classic Hollywood glamour after dressing up as a worm for Halloween.

Read more: Klum swaps unrecognisable worm costume for nearly naked number at Halloween party

Similarly, Paris Hilton likewise opted for some shimmer at the exclusive party, and posed for the cameras in a cut-out black gown.

Elsewhere model Kendall Jenner confused fans with a 'pause button' addition to her nearly naked sheer dress.

Other attendees included Olivia Wilde, Salma Hayek, Kim Kardashian, Carey Mulligan and Addison Rae.

Watch: Billie Eilish thinks her music is 'real' not 'depressing'