Mason, who was recently seen grabbing dinner with his family, stood beside his little sister Penelope, 11, and father Scott, who slung an arm over his shoulders.

Fans rushed to the comments section to express their delight over seeing the rarely-seen Disick, 13, on their Instagram feed.

Kim Kardashian shared a rare snap of her nephew Mason Disick as she posted several family photos to her Instagram on Monday

‘Omg WE HAVENT SEEN MASON IN FOREVERRRRRRRRRRR!!!!! Our little internet nephew GREW UP!!!!!!!!!!!!’ one fan posted.

‘Wow Mason had a whole growth spurt. So handsome!’ remarked one fan.

‘Is It Just Me Or Does Mason Actually Resemble Rob A lot?’ another posted.

‘Mason????? Pardon????????’ one posted.

‘Mason is a looking more and more like a junior Rob!! Rightv#??’ one fan remarked.

‘Mason looks like Rob,’ one chimed in.

‘Mason looks so handsome! He looks like a mix of Scott and Robert Kardashian Sr! Is lovely to see him!’ another posted.

Mason is the most low-key of all the Kardashian-Jenner cousins as he lacks a social media presence and is rarely pictured out.

The post also contained this snap of Kim with her daughters

Fans expressed their delight at seeing the rarely-seen Disick on their Instagram feeds

Many fans said Mason resembled his uncle Rob Kardashian

Kourtney previously revealed her son’s aversion for attention: ‘He does not like it. He doesn’t want any part of it. He’s not on social media,’ she said on Not Skinny But Not Fat podcast.

‘He doesn’t love it, and I want my kids to be kids. I crave normalcy as much as we can have it,’ she said.

Mason was notably absent from his mother’s Hulu wedding special, Til Death Do Us Part Kourtney and Travis, however he did attend the nuptials.

Kourtney shares sons Mason, Reign, and daughter Penelope with her ex Scott Disick. She welcomed a son named Rocky Thirteen Barker with husband Travis Barker last month.