Rob Kardashian appeared in high spirits as he joined his siblings to celebrate Khloe Kardashian's 36th birthday.
The 33-year-old reality star, who is seldom spotted on camera, beamed as he posed for a collection of photos alongside his nearest and dearest.
In the pictures Rob rubbed shoulders with Khloe's ex Tristan Thompson, Kourtney's ex Scott Disick, as well as his siblings as they all partied at the lavishly-decorated home.
On Monday, momager Kris Jenner took to social media to share a stunning picture that featured four of her six children at Khloe's party.
In the snap, Rob, Khloe and Kendall posed in front of the camera as a pink-haired Kylie walked toward them.
"4 out of 6 #happybirthdaykhloe," Kris wrote alongside the picture.
In the image, Rob cut a casual figure as he showed off him slimmed down physique in a comfortable black tracksuit.
The reclusive star also wore a backward cap on his head as he laughed with his siblings.
Sister Khloe also opted for a dark comfortable outfit for the event, while Kendall donned a slinky fire orange outfit.
The birthday girl also re-shared the cute picture among her birthday collection, but cut out her half-sister Kylie from the shot.
Khloe had pulled out all the stops to ring in her 36th birthday with her family and closest pals.
The stunning venue was littered with pink balloons and featured lots of ice cream, candles, flowers and tasty treats.
The Keeping Up With The Kardashian star's birthday guests were also offered baby pink face masks that had Khloe's face printed on the front.
Fans of the family have were excited to see Rob enjoying time with his sisters and pals across social media.
The television star has kept a relatively low profile in recent years, unlike his ultra-famous sisters.
Rob has also been embroiled in a bitter feud with his ex Blac Chyna, that led to a drawn out custody battle over their three-year-old daughter Dream.
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