Instagram / Kylie JennerGirls' groovy night out! Sofia Richie and Kylie Jenner and Kendall Jenner got glammed up and partied together at a pair of mutual pals' '70s disco-themed birthday bash.
The friends in question: The Jenner sisters' former private tutor-turned-friend, Tiffany Sorya, who turned 33 on Sunday, and Carter Gregory, who turned 26 and works for Capitol Records.
Sofia, Kylie and Kendall posted selfie videos of themselves getting ready together for the party, which was held at a nightclub.
"Wow, wow, wow!" Kylie, 21, shouted as she filmed Sofia, 20, showcasing a '60s style blonde hairstyle and a sparkling bra.
Kylie then shared a selfie video of her showing her wearing a blonde wig, a sparkling baby pink mini dress and sparkling rainbow platform wedges, standing with Kendall, 23, who sported a shimmering leopard-print dress and black sandals.
The group and other friends enjoyed some karaoke, with Kendall and Tiffany taking the stage for David Bowie's "Let's Dance."
On June 22, 2019, Kylie Jenner, Kendall Jenner, Sofia Richie and their friends celebrated at a joint '70s-themed birthday party for the sisters' former tutor Tiffany Sorya and fellow pal Carter Gregory. Here, the sisters pose in their '70s disco-style outfits.
Kylie Jenner captured this video of her friend and Scott Disick's girlfriend. Groovy, baby!
The sisters pose in the photo booth.
The birthday girl!
The Keeping Up With the Kardashians star shares a selfie video from the party.
The model showcases a '70s hairstyle.
The reality star takes a selfie.
Kylie Jenner shows off her shimmering rainbow platform wedges.
The reality star is all smiles.
Other guests included Kylie's good friends Anastasia "Stassie" Karanikolaou, Victoria Villarroel and Yris Palmer.
The birthday girl and boy received a silver disco ball-shaped birthday cake.
Sofia has been friends with Kendall, a fellow model, and Kylie for years, even before she started dating Scott Disick, her sister Kourtney Kardashian's ex, in 2016.
Earlier this month, she joined Kylie and most of the other women at the reality star's Handmaid's Tale-themed viewing party that doubled as a pregame birthday bash for Stassi.
Watch Keeping Up With the Kardashians on Sundays at 9/8c only on E!