RobKardashian revealed his shocking weight loss on Saturday in Las Vegas when he launched his Arthur George by Rob Kardashian sock line in at Neiman Marcus.

Following his break up from English singer Rita Ora the "Keeping Up with the Kardashians" reality star famously packed on the pounds.

However in the past few months Kardashian took control of his life and dedicated himself to achieving a dramatic weight loss.

[To see a photo of the slimmer Rob Kardashian click HERE]

At the event the reality star looked noticeably slimmer as he posed next to his mother Kris Jenner. He told Us Weekly that despite his current weight loss he still has a journey ahead of him.

He said, "I still have to lose like 40 to 50 pounds believe it or not. Six months I should be there."

Back in March the sock designer told Us Weekly the he weighted 235 pounds and in his quest for weight loss he enlisted his friends to join him in his two-a-day workouts. However he revealed that it did not work out too great and he had to take a different approach.

The star told the magazine that he has been working with his brother-in-law, Lamar Odom's personal trainer and is cutting back on drinking, especially while he is in Las Vegas.

"I'm not really drinking out here in Vegas. I've been here since Wednesday and I leave Monday - that's way too long. But I'm trying to get in a healthy direction."

In a February episode of "Kourtney & Kim Take Miami," the reality star told his sisters about his disappointing weight gain following his break up.

"It's crazy how this whole year, my whole relationship was only negative," he said. "All I did was gain f--king 40 pounds and lose so much money."

Kardashian told People Magazine that he is reaching for an ideal weight of 200 pounds by July 4th.