ROB KARDASHIAN celebrated his 25th birthday in Vegas at the 1Oak Nightclub with mom KRIS JENNER, older sister KIM KARDASHIAN, and younger sibs KENDALL JENNER and KYLIE JENNER.

Happy birthday, Rob!

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Rob has definitely had one hell of a year—the biggest highlight of which was his successful stint on “Dancing With the Stars.” The reality star, who is usually overshadowed by his more successful sisters, won a second place finish on the dance competition show last year, thanks to the patience and guidance of his partner, Cheryl Burke, his “secret weapon” butt, and his vastly improved dance moves.

Pretty impressive for a guy who just sits in the background, don’t you think?

Rob rang in his 25th birthday with Kris, Kim, Kendall and Kylie in Las Vegas, starting off with dinner at Stack Restaurant & Bar, which they followed with a quick visit and photo op at the Kardashian Khaos store at the Mirage Hotel.

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Noticeably absent from the festivities were Kourtney and Khloe, who instead greeted the birthday boy via Twitter.

The Kardashian Klan then spent the rest of the night partying at 1Oak Nightclub, where Rob was presented with an extravagant four-tier birthday cake.

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And lastly, a funny photo of Kris Jenner wilding out on the dance floor, which Kim aptly caption:

“Mom gone wild”

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Who knew Kris was such a party animal?

Photos By PR Photos / Kim Kardashian‘s Twitter

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