He’s all grown up!

Mason Disick made a rare appearance in a family photo shared on Instagram by his aunt Kim Kardashian Monday.

The 13-year-old held up a peace sign while posing alongside his dad, Scott Disick, and sister, Penelope, 11, during a group outing.

The trio was joined in the snap by the Skims founder and her four children: daughters Chicago, 5, and North, 10, and sons Psalm, 4, and Saint, 8.

“Everything,” Kardashian, 43, captioned the sweet pics.

Several fans were shocked by Mason’s appearance since he’s hardly ever seen in social media posts or featured on the family’s reality show, “The Kardashians.”

“Is that Mason??? Sheesh he looks so mature now!” one person wrote.

“shut UP. why does mason look 17,” another chimed in.

The 13-year-old was seen posing with his dad, Scott Disick, the Skims founder, his sister and his cousins. Instagram/@letthelordbewithyou

“Everything,” Kardashian captioned the post. kimkardashian/X

A third added, “Mason is a whole adult now.”

“Omg WE HAVENT SEEN MASON IN FOREVERRRRRRRRRRR!!!!! Our little internet nephew GREW UP!!!!!!!!!!!!” a fourth quipped.

The family photo marks the second time fans have received a glimpse of Mason in the past month.

Scott’s eldest child with Kourtney Kardashian tends to stay under the radar. kourtneykardas/Instagram

The teenager was spotted out on a rare father-son outing with the Talentless founder at Nobu in Malibu, Calif., in November.

He kept it low-key in a T-shirt and jeans as photographers snapped several photos of him walking from the restaurant to a black SUV.

Although he was born into the spotlight, Mason prefers to remain under the radar because he “craves” normalcy.

The Poosh founder previously explained that her firstborn “craves” normalcy. kourtneykardash/Instagram

“He doesn’t want any part of it. He’s not on social media,” his mom, Kourtney Kardashian, said on the “Not Skinny But Not Fat” podcast in an October 2022.

In addition to Mason, the Lemme founder, 44, also shares daughter Penelope and son Reign, 8, with Scott, 40.

The duo, who were together for nine years, have continued co-parenting since calling it quits in 2015.

Kourtney and Scott dated from 2006 to 2015. kourtneykardash/Instagram

She has since moved on with Travis Barker. Zuffa LLC via Getty Images

Kourney has since moved on with Blink-182 drummer Travis Barker.

The couple tied the knot in April 2022 and welcomed son Rocky Thirteen Barker in early November.

Meanwhile, Scott was most recently linked to Rod Stewart’s daughter Kimberly in August 2022.