Jeff Kravitz/FilmMagicSaturday was sisters' night out for Kourtney Kardashian and Kendall Jenner, who were each other's dates at The Comedy Central Roast of Justin Bieber.
Kourtney, 35, looked gorgeous in a black and white mini dress with a tuxedo design, which showed off her slim post-baby body perfectly, while her 19-year-old model sister turned heads herself in a ribbed, gray, off-the-shoulder top and black knee-length pencil skirt, paired with gladiator sandals.
Kourtney, who three months ago gave birth to son Reign Aston Disick, her third child with partner Scott Disick, recently revealed her weight via an Instagram photo, saying it was the lowest figure she has seen in a while. The Keeping Up With the Kardashians star, who has usually appeared slim, had started working out at the gym about a month after her pregnancy.
At the Bieber roast, she and Jenner were photographed sitting in the front row of the Los Angeles theater where the taping took place and speaking to Martha Stewart, who was one of the roasters.
The sisters also attended an after party, along with fellow celebrities such as Jaden Smith, and Jenner chatted with the Biebs himself. The two have hung out several times before.
The event took place a day before the season 10 premiere of Keeping Up With the Kardashians. The Bieber roast will air on Comedy Central on March 30. Kevin Hart was the roast master, while other roasters included Jeffrey Ross, Snoop Dogg, SNL's Pete Davidson and Hannibal Buress.
Bieber called the roast "one of the best nights ever."
Tonight was one of the best nights ever. Thank you to everyone involved. Thank you
? Justin Bieber (@justinbieber) March 15, 2015Kourtney shared several selfies and other photos from the event on Instagram. Check them out below.
The season 10 premiere of Keeping Up With the Kardashians begins on Sunday, March 15 at 9 p.m. ET on E!