The couple, who began dating in 2012, welcomed daughter North in June 2013. The pair got engaged the following October and tied the knot with a luxurious ceremony in Florence, Italy in May 2014. They welcomed son Saint in December 2015.
Kim also paid tribute to her late father, Robert Kardashian Sr., with a cute throwback pic from her childhood.
"God I am so lucky you were my dad. I remember right before you passed away I thanked you for everything u taught me," Kim captioned the pic of her and her father, who died in September 2003 after a battle with esophageal cancer.