“Let the festivities begin,” Kim tweeted Friday, along with a photo of her, Rob, Kylie and Kendall in their hotel room before the shindig.
“Can’t wait to see what everyone in #vegas is talking about. @1OAKlv for my birthday celebration tonight!,” Rob chimed in early Friday.
Kim and Kris continued the party with the birthday boy at the Las Vegas hotel’s 1 OAK Nightclub, where he was treated to a colorful tiered cake created by chef Jean Philippe.
“Happy Birthday to my brother @RobKardashian wooohoooooo,” Khloé tweeted Saturday.
Kourtney also gave Rob a shout-out, writing “Happy Birthday to my favorite brother @RobKardashian!! Missed you guys last night! I love you so much. Come over for some cinnamon booty!”
Happy 25th birthday, Rob!