She welcomed her third child, son Reign, on December 14, 2014.
And on Saturday, Kourtney Kardashian shared a throwback image to her Instagram account of herself while pregnant with Reign.
The reality star, 39, was pictured in a gold bikini with daughter Penelope resting on her stomach.
Kourtney captioned the adorable image simply with ‘Time flies.’
She shared the photo the same day as her ex partner and the father of her three children – Scott Disick – turned 35 years old.
While Kim and Khloe Kardashian wished him a happy birthday, Kourtney stayed mum.
Kourtney and Scott are parents to three children together: Mason, age eight; Penelope, age five; and Reign, age three.
On Thursday, Kourtney celebrated her one year anniversary with boyfriend Younes Bendjima, 25.
The gorgeous brunette posted a snap of a bouquet of red roses, adding: ‘365 days of love,’ tagging her beau.
Younes is a former boxer turned model from Algeria.