Popsugar Celebrity Celebrity Kids John Stamos and Son Billy on His First Day of School John Stamos Tries "Not to Cry" on His 4-Year-Old Son's First Day of School 31 August 2022 by Chanel Vargas View On One Page Photo 2 of 2 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Caitlin McHugh Stamos (@caitlinskybound) Share This Link Copy ← Use Arrow Keys → 2 Previous Next Start Slideshow Celebrity KidsCelebrity InstagramsCelebrity FamiliesBack To SchoolJohn Stamos