And while Stamos has taken on a lot of roles throughout his career, he’s shared how being a dad is one of his most cherished.
“You are everything beautiful and meaningful in my life,” the Grandfathered star wrote in an Instagram message to Billy for his sixth birthday. “Seeing you so full of wonder, so content, lights a warmth in me that gets rid of all the shadows and doubts of life. You, in your innocence and joy, make every challenge worthwhile. God only knows where I’d be without you, my dear son. You and your sweet mother are my purpose, my joy, my everything.”
Over the years, Stamos has given fans glimpses into his family’s world, such as by posting photos from their family vacations, red carpet appearances and time at home. To celebrate his birthday, look back at some of his adorable photos with Billy.