Rob Kardashian shows off impressive weight loss as he makes rare appearance at Khloe's 36th birthday

The reality TV star previously wished Khloé a happy birthday with an adorable throwback photo of them as kids, which he captioned: 'Happy Birthday Khlo-moneyyyy!! Woohoo ! I LOVE YOU best friend.'

Rob Kardashian shows off impressive weight loss as he makes rare appearance at Khloe's 36th birthday
The reality TV star previously wished Khloé a happy birthday with an adorable throwback photo of them as kids, which he captioned: 'Happy Birthday Khlo-moneyyyy!! Woohoo ! I LOVE YOU best friend.'