Kylie and Kendall Jenner dressed up in '70s style in order to attend a disco-themed birthday party recently. Their former private tutor-turned-friend Tiffany Sorya celebrated her 33rd birthday, and it was also the 26th birthday of Carter Gregory.

The Jenner sisters were joined by family friend Sofia Richie, and they all shared pictures and videos of the party online, E! News reported. The three of them shared pictures and videos of them getting ready, and they also shared how they enjoyed at the party.

Kylie wore a blonde wig and a sparkling pink mini dress, while Kendall opted for a leopard-print dress with black sandals. Richie wore a sparkling bra and had a '70s hairstyle.

Richie is currently dating Kourtney Kardashian’s ex, Scott Disick. However, Richie has been friends with the Jenner sisters before she started dating their sister’s former partner. She shared a picture of the party on Instagram and called it “girls night.”

The black and white picture carries a happy birthday message for Sorya and Gregory. The pictures just show the people who went to the party get together to pose for the cameras.

The birthday party was held at a nightclub. The birthday celebrations included karaoke that everyone took part in. Kendall and Sorya reportedly sang David Bowie’s “Let’s Dance” on the stage. Some of the other guests at the party were Anastasia “Stassie” Karanikolaou, Yris Palmer, and Victoria Villarroel.

Meanwhile, Kylie shared a video of her going out to party on Sunday night on Instagram. The video shows her from the back, walking in a mini dress. The makeup mogul turns around to face the camera towards the end of the video.

Kendall on the other hand shared a few promo messages online over the weekend. The most recent personal picture she shared on Instagram shows her taking a selfie in a bathtub.