Kim Kardashian's husband Kanye West reportedly inspired Rob Kardashian into undergoing a weight loss regimen as the former "Keeping Up with the Kardashians" star already dropped 15 pounds in recent weeks.

"It's Kanye working his magic," Us Weekly said. "He's been a great motivator for Rob. He told Rob how he got into shape after his accident and at a time when he was down in his life."

Kanye West underwent a long rehab after he figured into an accident in 2002 which broke his jaw in three places.

Aside from helping Rob Kardashian on weight loss, the rapper, who announced during the VMAs that he's running for president in 2020, also reportedly helped repair his relationship with sister, Kim Kardashian.

The two had a falling out after Kim Kardashian reportedly has been "bullying" Rob Kardashian into undergoing a weight loss program prior to her wedding with Kanye West. Their issues came into a head when the sock mogul left Paris in a huff and didn't even attend the wedding.

Kim Kardashian earlier shared a photo on her Instagram showing her and her brother on a hike in California, proving that Rob Kardashian is indeed doing something about the weight gain.

E! News has reported that Rob Kardashian is really committed to to the weight loss program, as the sock mogul reportedly ballooned to 300 pounds.

"For the first time in a long time Rob is committed to changing his diet habits," the source claimed.

"He's been working with a chef and doing really well."

Gunnar Peterson, Rob Kardashian's personal trainer, dished to E! News, "His regimen involves more than just cardio and weights."

Rob Kardashian shared a photo back when he was still a few pounds lighter as he blamed milkshakes for the weight gain. The "KUWTK" actor wrote, "Started right here with these milkshakes hahaha ... #throwbackthursday."