The Kardashian clan wished Scott a happy birthday on social media, before joining him for a special family dinner at a restaurant.
Kourtney posted an extra-special message to her former boyfriend and the father of her three children on Instagram, sharing a throwback pic of her sitting on Scott while wearing a bikini and writing: "Happy birthday baby daddy!".
Kris also wished Scott a happy birthday and thanked him for "being a loving and devoted father to my beautiful grandkids," on Instagram, while daughter Khloe called him: "Forever my brother and forever my bestie!".
Kim wore a skintight Ermanno Scervino dress to the family dinner at NoBu, which she told fans on Snapchat she "loved".
Kim also Instagrammed a pic with the birthday boy, captioning it: "Happy Birthday Lord!!! Spending all day trying to find the right pic to post made me remember all of our amazing memories as a family! Love you."
Scott and Kourtney ended their nine year relationship last year, but have continued to remain friends for the sake of their three children, Mason, Penelope and Reign.