"I love the love you share with our daughter," wrote Jenner in an Instagram. "Thank you for everything you do … today we are celebrating you."
The post featured black-and-white snapshots of the rapper holding his chubby-cheeked daughter and looked more than five million times.
Scott also posted a series of photos with a note to his daughter.
"The day Mom made me a dad that I could not wait, I had to go every day with you to conquer this planet," he writes.