Former U.S. President Barack Obama’s daughters, Sasha and Malia, made an appearance at Billie Eilish’s star-studded Hollywood party, dressed in Wild West-inspired outfits.

Malia, 26, rocked a denim mini-skirt, white tank top, and tall boots, finishing her look with a black cowboy hat, a snake accessory around her neck, and a white bandana tied to her arm.

Meanwhile, her sister Sasha opted for a more understated look, wearing a blue top, striped mini-shorts, and brown leather boots.

The party, hosted by the “Bad Guy” hitmaker, saw several other celebrities in attendance, including model Kaia Gerber, rapper The Kid LAROI, and actress Kiernan Shipka.