Mark Ballas, Kim Kardashian, Kris Humphries and Kris Jenner celebrate Kim Kardashian's birthday at Marquee Nightclub.

Saturday night, Kim Kardashian celebrated her 31st birthday at Marquee Nightclub inside The Cosmopolitan of Las Vegas. The birthday girl was joined by new husband Kris Humphries, her sister Khloe and her husband Lamar Odom, mom Kris Jenner and Kim’s former “Dancing with the Stars” partner Mark Ballas. The family was mobbed by fans as they made their way to Marquee after enjoying signature Italian dishes in the private dining room at Lavo at the Palazzo, where they toasted with Midori Sour cocktails and Champagne.
As hoards of fans were screaming her name from the casino floor, Kim made her way to the red carpet as it erupted in a flashbulb frenzy with her family looking on cheering. Once Kim was finished she stopped and signed autographs and photos that fans had brought for the event before heading upstairs to the club.

In the club they took in the sounds of international DJ Cedric Gervais from a VIP table on the dance floor. Kim got on the mic saying she was excited for Cedric to spin and told the DJ “Cedric turn it up! ” Kim was thrilled with her birthday cake from Gimme Some Sugar, which depicted the happy couple in a white Ferrari with a custom Kardashian logo on the car. Later in the night Kim and crew got a hip hop fix from DJ Lema in the club’s Boom Box Room. Khloe and Lamar danced and Khloe got on the mic to have the entire room sing “Happy Birthday” to her sister.

Also spotted at Marquee was Jim Belushi, who stopped by around 2 a.m. to check out the hot spot.

Click on the photos below to enlarge.

Like Haute Living Las Vegas? Join our Facebook page or follow us on Twitter. Want Haute Living Las Vegas delivered to your in box once a week? Sign up for our newsletter.