The KOURT X KYLIE makeup collaboration is almost here. To promote the new makeup line, the siblings took a jaw-droppingly gorgeous swimsuit shot.

Two Titans Unite

This is the latest collab for makeup mogul, and Kylie Cosmetics founder, Kylie Jenner. The social media aficionado and reality TV star previously collaborated with sisters Khloe Kardashian and Kim Kardashian West, who has her own makeup brand, KKW Beauty.

Kourtney Kardashian is the latest to team up with Kylie Cosmetics, and it's safe to say anticipation for the collection is at an all-time high.

Jenner gave fans a glimpse of the upcoming collection at Coachella last weekend, where she made her first public appearance following the birth of daughter Stormi, to host a party to promote the latest addition in her makeup line.

The collection, which isn't available yet, was revealed in full on Instagram on Wednesday night in celebration of Kourtney's 39th birthday.

Revealed In All Its Glory

Kylie posted a campaign shot where she and Kourtney posed together in matching swimsuits.

"HAPPY BIRTHDAY TO THE QUEEN! so excited to announce the KOURT X KYLIE collaboration. this collection gives me so much lifeeeee! 3 mini palettes & 3 of Kourtney's signature lippies launching 4/24! collaborating with you was so much fun! I love you!" she wrote alongside the pic.

The 20-year-old mother and business entrepreneur didn't forget to mention that she and her big sister are wearing a shade called RAD in the shot. The upcoming collection includes eye-shadow palettes with four shades and a variety of liquid lipsticks.

"I am so excited to announce my collaboration with @kyliejenner We have been working on this for a year...3 mini eyeshadow palettes and 3 lips..I am wearing Matcha on my eyes and RAD on my lips. Happy Birthday to me!," she gushed on Instagram.

Jenner also shared some of her famous swatch videos with fans, in keeping with her traditional product reveal.

Kardashian inspired each eyeshadow pallet, and there are notable references to her life, including Gluten Free and Ma$3, for her 8-year-old son Mason. The lipsticks, meanwhile, come in a pale pink nude, a pinky-pink, and a poppy red. These shades are the go-to lippy colors for the busy mother.

Keeping Things Busy

Rumors of a collaboration between the famous sisters circulated when a fan spotted a prototype labeled "Kourtney" lying around in an episode of the hit reality show Keeping up with the Kardashians.

Jenner revealed the collection on Instagram before stepping out with boyfriend and baby daddy Travis Scott to watch a basketball game in Houston, Texas, where the two were first spotted together and rumored to be dating just over a year ago.

As a result, she missed out on Kourtney's 39th birthday celebration. The mother-of-three stepped out along with momager Kris Jenner, sisters Kendall Jenner and Kardashian West, Kanye West, and Malika and Khadijah Haqq for a classy dinner.