Rob Kardashian Posts Throwback Shirtless Instagram Photo of Him Eating

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Is Rob breaking into his sisters' Instagram game?

One of the more reclusive members of the Kardashian clan may finally be warming up to social media.

Rob Kardashian made a return to his neglected Instagram account on Thursday to post a #TBT photo to time spent in Malibu. Although he doesn't say when exactly the photo was originally snapped, we can see Rob shirtless as he chows down on a pulled pork sandwich.

WATCH: Kris Jenner Worries Rob Kardashian Is 'Going to Die,' Says He's Gained 100 Pounds In the Last Year

The photo comes as somewhat of a surprise, as Rob has not only removed himself from the spotlight, but he's also been criticized as of late for his noticeable weight gain.

Last April, Rob's mom, Kris Jenner, was on the verge of tears over his weight gain, but recently, his siblings have spoken lovingly about him. Just last week, his step-sister Kendall Jenner posted a throwback of her own that showed Rob laughing during an episode of Keeping Up With the Kardashians that aired in 2012, and his older sister Khloe Kardashian revealed that she has taken Rob into her home.

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"Rob lives with me now and I wouldn't have it any other way. I love having him with me," Khloe told Complex magazine. "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."

Hopefully, this is a sign that Kardashian fans will see more of Rob in the upcoming season of KUWTK or in Caitlyn Jenner's new show, I Am Cait, where he briefly appeared in the premiere.

See more from the premiere of I Am Cait in the video below.