Kourtney Celebrates Kim's 45th Birthday with Touching Social Media Tribute

As Kim Kardashian celebrates her 45th birthday in Paris, promoting her upcoming Hulu legal drama "All's Fair," her older sister Kourtney Kardashian Barker, 46, has taken to social media to honor the special occasion.

Kourtney, the founder of the Lemme brand, has shared a touching tribute to her "best friend" Kim, posting a carousel of 10 of her favorite photos of the two sisters over the years. The images range from a throwback snap of the pair in their teenage years to more recent behind-the-scenes selfies and glamorous shots of the famous siblings.

Among the highlights are photos of the sisters wearing matching outfits, from skintight latex suits to satin pajamas, as well as candid moments of the two making playful faces. Kourtney also included some of the stunning nighttime swim photos that Kim had previously shared from her 40th birthday trip.

The heartfelt post serves as a testament to the unbreakable bond between the Kardashian sisters, who have grown up in the public eye and remained each other's closest confidants.