Mum-of-three, Kourtney turned 39 on Wednesday and Khloe publicly gushed over her sibling in a sweet post.
"Happy birthday @kourtneykardash!!!! In any lifetime I would have found a way to have you in my life forever!" new mum Khloe wrote on Instagram alongside a series of pictures of them posing together over the years.
"I can't imagine life without you! Have the best birthday!! You deserve everything and more! Forever and always I love you!!!"
Khloe's post was the second upload she's shared since boyfriend Tristan was accused of cheating on her with multiple women.