"Happy Anniversary to one of the most amazing men I know!!!! I love you, Wow 23 years!!!!! #love #weareofficiallyvintage," Jenner captioned an old photo of the two.
Jenner's post comes two weeks after the formerly separated couple was spotted holding hands in LAX.
"We've been together," Bruce Jenner casually told photographers at the time.
The Jenners tied the knot in 1991. The pair have two children together, reality starlets Kendall and Kylie Jenner. In October of 2013 Kris Jenner announced the two were separating after 22 years of marriage adding that Bruce would be moving to his Malibu home permanently.