Kourtney Kardashian's son Mason Disick joins Instagram

“I can’t believe this is happening,” said Khloé Kardashian on Mason’s Instagram.

Kourtney Kardashian’s son, Mason Disick, has made his debut on Instagram.

The Kardashian’s, 14-year-old child, with ex Scott Disick, launched his official Instagram profile, on Saturday, May 25th.   

Disick shared rare photos of himself, looking mature and all grown up on Instagram. 

Mason posted a photo of himself posing outdoors on a balcony, his head slightly lowered while sporting a cap that covered his face, wearing a black T-shirt paired with khaki green baggy pants, as his first post. 

Courtesy: @masondisick

In another photo he shared, he had his back turned to the camera, to give a further glimpse of his outfit.

Khloé Kardashian and Kim Kardashian, Mason’s aunt, expressed their emotions in the comments section. 

Khloé wrote, “I can’t believe this is happening,” while Kim added, “You’re really on Instagram.”

Mason, Kourtney's oldest child, is from her ex Scott. Following Mason are his sister Penelope and brother Reign. 

The trio welcomed their youngest sibling, six-month-old Rocky Thirteen, Kourtney's first child with her husband Travis Barker.

Taking after his social media-savvy mom and aunts, each boasting over 200 million followers, due to his family's presence on social media, he has quickly gained 115k followers in one day.