The 33-year-old reality show star, who recently admitted dressing her changing shape is a 'challenge', tried a bold new maternity look with a pale green jumpsuit complete with baggy parachute pants.
However, there was no disguising her compact baby bump, although she spent much of the day carrying her two-and-a-half-year-old son Mason on one hip.
Reality queen in green: Kourtney Kardashian carried little Mason to her local park in Calabasas, California earlier today
She looked stylish in the ensemble with oversized sunglasses and pink lipstick completing the look.
A white jacket and flat gold strappy sandals completed the look.
Bundle of love: Kourtney holds growing little Mason in her arms, while Scott Disick strolls alongside
What a cutie: Mason is fascinated by a park water feature, while Kourtney crouches down alongside her little boy
Their son Mason looked ultra cute in denim shorts, a blue shirt and his own mini moccasins.
He enjoyed his day out in Calabasas, an area of Los Angeles near the Kardashian family home, and seemed particularly taken with a pond in the park.
Mother love: Kourtney dressed for comfort in the all-in-one outfit which she teamed with gold strappy flat sandals
Multi-tasking: Kourtney carried little Mason in one arm and held her brown leather bag in the other
'I am excited to have a girl, to have a new experience,' she said. 'I'm really excited for Mason to not have to compete with a little brother.'
She also told Rachael Ray that Mason is also excited about having a baby sister.
'Yesterday he was talking about how he's excited to hold her and he's been like, recently obsessed with babies,' she said.
It's a girl: Kourtney recently revealed that their new arrival would be a girl