Gwyneth Paltrow is commemorating son Moses' new decade. "Happy 20th (!!) birthday to you @mosesmartin you are the definition of a gentleman - kind, intelligent, thoughtful and soulful," Paltrow, 53, wrote via Instagram on Wednesday, April 8. "It's beyond words how incredible you are. I'm sending you a big birthday hug from the west coast. Don't forget to check the mailbox today. I love you to bits, mama ❤️." In the comments section, Moses replied, "❤️❤️❤️.