The Mulholland Drive star, 54, took to her Instagram on Wednesday, posting a black and white photo of her teenage daughter Kai on the beach. "Happy birthday my sweet little angel. You are everything to me. I'm so lucky to be your mum. Keep dancing and showing the world your dynamic and glorious spirit." Still Alice actress and one of the star's friends, Julianne Moore, also sent her wishes to Naomi's youngest child. She wrote in the comments, "Happy birthday beautiful Kai.". Australian model Alison Daddo also chimed in, adding: "Happiest of days to your sweet one."