Kim Kardashian has written a gushing tribute to her sister Kourtney to mark her 45th birthday.

The oldest of the Kardashian brood celebrated the milestone on Thursday (April 18) and Kim – two years her junior – was quick to take to Instagram to pen her thoughts. The pair haven’t always seen eye to eye, with their Disney+ series featuring an apparent feud last year after Kourtney accused Kim of using her wedding as a business opportunity.

They appear to have put their differences behind them, however, with Kim sharing a ʙικιɴι-clad of the duo alongside their sister Khloe in a sizzling beach snap. The trio all donned black ensembles as Kim pouted and gave a peace gesture.

Happy Birthday Queen @kourtneykardash,” Kim began in the caption for the post. “There’s no one on this planet that I have spent more time with and have all of the same memories with growing up than you and I cherish them all.

“Sharing a room and friends and cars and our lives together for four decades has been the most magical journey to have you by my side. I love you and I can’t wait for another 45 years together! I will especially cherish this last sister trip where all of our kids had dance parties til they pᴀssed out, the way we all did growing up!”

Commenting on the birthday girl’s stunning physique, meanwhile, one fan replied: “Can we talk about how good Kourtney looks tho!!! 4 kids later and naturally showing it off.” Another added: “I think Kourtney looks absolutely gorgeous yay for her looking real!!”

A third wrote: “Hello Mrs. Barker. You look the most stunning I have ever seen you!! Happiest of birthdays to you gorgeous!! Definitely now the most interesting to look at!!! And a fourth said: “After all these babies Kourtney looks naturally amazing!!!”