The 29-year-old has come out of hiding and is looking fitter than ever.
The former recluse proudly showcased his impressive weight loss as he stepped out with his girlfriend at Onyx Nightclub in LA on March 27.
Rob has openly credited his 27-year-old lady love with helping him shed his extra weight over the past months.
The curvy model often shares social media sharing snaps of their trips to the gym and the healthy meals she cooks for her man.
Meanwhile, his family couldn’t be happier for him.
Speaking to E! News after Rob’s 29th birthday bash, Kendall gushed about her big brother’s newfound confidence.
“It’s all really amazing and we’re just very happy to kind of see him and kind of hang out with us again,” she said proudly.
And close pals are noticing the difference too!
“They haven’t seen Rob come out of his shell like this in years,” a source told E! News earlier this week.
“The family is very grateful for Blac’s help with giving Rob confidence again and putting his health and fitness first.”
Over the last few years, Rob has kept out of the spotlight while he battled with depression.
“Nobody’s been able to help him,” one source admitted to People. “Khloe and Kendall have really tried to get him out of the house, and they could never do it.”
Unlike his sisters, it seems Blac has the magic touch, “She’s come along and obviously it’s made a difference.”
Last December Rob was hospitalised and diagnosed with type 2 diabetes, however according to registered dietitian Lisa DeFazio, his disease could be reversed should he continue his health kick.
“Now that Rob has lost a significant amount of weight, at least 50 pounds [about 22kgs], his diabetes may be reversed,” she explained to HollywoodLife.com.
“However, if he gains the weight back, the diabetes will return. It’s important for him not to yo-yo with his weight.”
The notoriously private Kardashian has spoken out about the positive influence his girlfriend has added to his life.
Taking to Instagram following a report which claimed he’d split up with the mum-of-one, the sock entrepreneur penned this heartfelt note.
“Chy and I are not broken up we just feel like it would be a lot healthier for our relationship if we kept a lot more to ourselves. It’s impossible to have a positive relationship with so much negativity from the media and outsiders and we would appreciate it if everyone respects that.”
Fans would remember that Rob left his family’s reality show Keeping Up With The Kardashians back in 2013, and the following year he ditched big sister Kim’s wedding in Italy.
Despite the turbulent few years, it’s clear Kris Jenner’s only son is on the right track, and the Kardashian matriarch couldn’t be happier.
Speaking to Kyle and Jackie O the 60-year-old happily told the Aussie radio duo, “He feels so much better about himself [since they started dating].”
“He is doing really, really well. He’s trying to be healthy and get in shape, and he is also working on a couple of projects.”
Adding, “She [Blac] seems like a really nice girl but I just haven’t been around her.”