What do you do to celebrate your sister’s birthday? If you’re beauty mogul Kylie Jenner and your older sibling just happens to be Courtney Kardashian , you do it by announcing to the world that your makeup collaboration is finally here.

In an April 18 Instagram post, Kylie wrote, “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!” The new mom added, “Collaborating with you was so much fun! I love you!” After telling her fans to check out her Instagram stories for more information, she revealed that they are both wearing one of Kourtney’s new shades in the photo.

Over on her Instagram page Kourtney took time out of her birthday celebrations to promote the collaboration. Sharing a shot of her on her own, she wrote, “I am so excited to announce my collaboration with Kylie. We have been working on this for a year…” She later added, “Happy Birthday to me!”