Fans Are So Happy as Rob Kardashian Makes Appearance at Khloé's Birthday Celebration Looking Happy and Healthy

Three cheers for Rob Kardashian! Fans were elated to see the always-aloof Kardashian-Jenner brother turn up at Khloé's 36th birthday party this past weekend.

Rob is known to be one of the most private of the siblings, but he was seemingly the life of the party at Khloé's get-together hosted by Kylie Jenner. He shared a slew of photos from the bday party, and was smiling from ear to ear in every one. In one pic, which you can see below, Rob was captured cheezin' with Tristan Thompson and Tristan's friend Savas Oguz. 

In another below, he sweetly cuddled up to Kourtney Kardashian. "Sweet 16," he jokingly captioned the pic.

Rob also posted a photo chatting it up with Scott Disick.

Even before the party, Rob sent lots of love to Khloé on the 'gram. The Keeping Up With the Kardashians star shared a post on June 27 to wish his sis a happy birthday by sharing a childhood photo. "Happy Birthday Khlo-moneyyyy!! Woohoo ! I LOVE YOU best friend [blue heart emojis] TONIGHT WE DRINK AS KINGS‼️ (inside joke)," he wrote in the caption.

Fans were understandably excited to see Rob out and about, as well as looking slim and happy. He received tons of support on Instagram, with comments such as "yesss rob! good to see you so happy," "Glad too see u back sexy," and "Rob!!!! So freaking handsome!"

Rob definitely made up for lost time with all the memories he shared from Khloé's big day!