Rob Kardashian unveils huge weight loss in first public appearance for 17 months

Rob Kardashian appears to have undergone a body transformation after making his first public appearance in 17 months.

The brother of the famous Kardashian sisters showed off a slimmed down figure as he posed on Instagram beside his mother Kris Jenner for Halloween .

Rob, 32, went dressed as a troll while Kris, 63, looked striking in her Dia De Los Muertos outfit - including a full face of make-up.

But all eyes were on Rob who emerged that night after not being seen publicly in almost two years.

Rob emerged on Instagram after not being seen in 17 months

He has kept out of the spotlight in recent years

Rob stepped out of the public eye following his break-up with Blac Chyna

Rob, who has shunned the limelight unlike his famous sisters, stepped out to attend a star-studded Halloween party at the Los Angeles nightspot Deliah.

The dad, who shares daughter Dream with ex Black Chyna, has been described as becoming 'very introverted' by his sister Khloe in the past and spoken himself about issues with his weight.

Khloe told Wonderwall in 2015: "I just feel, especially over the last year, Rob has become very introverted and has a kind of social anxiety.

Rob's sister Khloe said he became very introverted

Kim Kardashian was upset when Rob pulled out of her wedding at the 11th hour

“He’s definitely not at his happiest place that he once was, and I know he can get to that happy place and he will."

The year before Rob pulled out of Kim Kardashian's wedding to Kanye West at the last minute.

"I was doing my suit fittings in Paris right before the wedding and I just wasn’t comfortable," he told People. "I’m 6’1″ and at my most I probably weighed 300 lbs."