Reclusive Rob Kardashian posts a selfie -- and it appears to be a big deal

Rob Kardashian posted a selfie on Sunday night, and though it contained no nudity, profanity or anything out of the ordinary -- which can't always be said for members of this selfie-loving family -- it was billed as a big deal.

The "Keeping Up With the Kardashians" star, who is the younger brother of Kourtney, Kim and Khloe Kardashian, has rarely appeared in public or posted recent images of himself in several months, shying away from the spotlight after a purported 100-pound weight gain and a rumored struggle with depression.

But now, the reclusive 28-year-old has reportedly been working on himself, specifically losing weight, as evidenced in the slimmer face that appears in his late-night self-portrait.

PHOTOS: Meet the Kardashians and their extended family

Kardashian captioned the casual black-and-white snap with "Gnight" and gave rise to a slew of stories that hailed his return to social media with a recent pic -- rather than older images he's wont to post.

Gnight

A photo posted by ROBERT KARDASHIAN (@robkardashian) on Aug 30, 2015 at 10:46pm PDT

The E! reality star recently joked that his weight gain started with milk shakes, but he has appeared to make a more conscious effort to shed the pounds by working out and hiking with Kim, which she's tweeted about on several occasions.

E! News reported last week that he's hired a personal chef and is working with personal trainer Gunnar Peterson to lose weight. Incidentally, that was when he shared that he bumped into his half-sister Kylie Jenner and her boyfriend Tyga during one workout.

"Spotted these fools on the morning workout," he captioned an Instagram photo last week. (The image has since been removed.)

Kardashian, whose struggles have long been a concern on the family's reality TV series, is currently living with Khloe at her Calabasas home, and she said that she "wouldn't have it any other way."

"I love having him with me," the 31-year-old reality TV star said in a recent interview with Complex. "He's going through a hard time now and it's behind gates. With this crazy lifestyle you have to think of places where you can still have your freedom."

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