The reality television star looked amazing as she dined with her family at The Ivy restaurant in Santa Monica, California, yesterday afternoon.
The 33-year-old was dressed in a long monochrome dress as she and her siblings enjoyed a late brunch with the leader of the Kardashian clan, Kris Jenner.
Monochrome: Kourtney Kardashian looked amazing in her black and white dress as she celebrated Mothers Day, yesterday, in Santa Monica
Kourtney, who is already mother to two-year-old Mason Disick, covered her baby bump in a floor length dress which was split in half by black and white.
The model and socialite kept her face hidden behind a large pair of sunglasses and wore her long brunette locks up in a bun.
Despite her high fashion style, it was her 56-year-old mother who really stole the show in a revealing outfit.
Upstaged: While Kourtney covered up her baby bump, Kris Jenner was eager to show off her legs in a short orange number
Family affair: The Kardashian clan were out in force to honour Kris Jenner at a very special Mothers day brunch
Kris showed off her legs in a baggy loose fit orange blouse, which she teamed with a pair of bronze strappy heels.
The mother-of-six appeared to have forgotten to put on her trousers with the attention grabbing item but hid her blushes behind a pair of shades.
Khloé Kardashian and husband Lamar Odom were also present at the brunch and the cute couple colour coordinated their wardrobe.
Multi tasking: Khloé carried her dapper dressed nephew Mason Disick while managaing to send a text message at the same time
Basketball star Lamar wore a red shirt with blue trousers, while Khloé rocked a pair of red trousers with a white blazer.
The Kardashian girls later posted some very affectionate words about their mother on their blogs.
Kourtney said: 'Happy Mothers Day to my beautiful mom who teaches me so much about the world and about being a mom.
Lady in red: The businesswoman looked great in her white blazer and colourful trousers
'Being a mom is my absolute favorite role that I have in my life and I feel so blessed to have my mother and grandmother to inspire me to be the best mom I can be.
'I also feel so lucky to meet and have other mommy friends who inspire me as well. I wish every mother a very special day with your children.'
Khloé shared the sentiments and wrote: 'Happy Mother’s Day to the funniest, kindest, most outrageous mom in the whole world — the one and only Kris Jenner!
'I love you mom!!!! Where would we be without you?! Thank you for everything.'
