Her Instagram post features an adorable throwback photo of her and Malia when she was a baby.
"Happy birthday, Malia," Obama wrote in the caption. "24 years ago, this day became extra special when your wonderful spirit arrived in this world. I'm so proud of the beautiful, caring, and driven young woman you've become. I love you so, so much! Love, your Mommy."
Malia's dad, former President Barack Obama also celebrated his daughter's birthday with a sweet throwback photo of them together when Malia was a baby.
"Happy Birthday, Malia! No matter how sophisticated, accomplished, beautiful, and gracious a young woman you've become -- you'll always be my baby," he wrote in an Instagram post. "And I will always be here to lift you up."