Rob Kardashian Appears Thinner In First New Selfie Shared in Years

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Get ready for Rob Kardashian's comeback!

The reclusive reality star and his famous family have been tweeting that he's getting back in shape, and from the looks of this selfie, Rob's hard work is paying off!

WATCH: Rob Kardashian Steps Out for First Time in Months -- See the Pics!

"Gnight," Rob captioned the pic posted to Instagram on Sunday night. 

The is the only selfie of the 28-year-old Keeping Up With the Kardashians star on his Instagram.

Over the weekend, Rob's mom, Kris Jenner, told ET that her only son "is on a good path right now."

The momager gushed that Rob has been working out and is "doing terrific."

MORE: Rob Kardashian Posts Throwback Picture, Suggests Milkshakes Kicked Off His Weight Gain

It's certainly been the summer of health for Rob. Earlier this month, his sister Kim Kardashian revealed that she was working out with her younger brother. "Just went on the hardest hike ever today with @robkardashian," she tweeted on August 14.

Kim also tweeted this past week: "Rise & Grind! Workout time!!!!! With @robkardashian."

WATCH: Khloe Kardashian -- I Call Rob My Son As a Joke

Rob, who's been notoriously private since his weight gain, also posted about his workout when he ran into Kylie Jenner and Tyga. "Spotted these fools on the morning workout," he captioned an Instagram pic of the youngest Jenner sibling and the rapper. He later removed the photo.

One thing's for sure, the Kardashian-Jenner clan are making Rob's quest to get back in shape a family affair.

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