"I love seeing the outfits he picks out," the mother-of-three captioned the snapshot.
The Poosh founder rocked white wide leg pants and a matching feather top as her little boy looked on proudly in the photo.
"He's good really good taste for a toddler," one fan wrote in the comments section. "Why do you need a stylist when you have Reign Disick?" another joked.
"My Northie girl is the ultimate fashionista! She comes with me to fabric stores and picks out what she likes and for our Japan trip I let her style herself. I should have let her style me too lol. She loves it. She’s having fun and I am so happy she’s so expressive," Kim wrote on social media on August 11.
Do you like the outfit Reign picked out for Kourtney? Sound off in the comments below!