He shares Billy with his wife, Caitlin McHugh Stamos. Two months before their wedding in February 2018, John and Caitlin announced their pregnancy exclusively to PEOPLE. “I’ll be a fun dad.

John Stamos shared a wholesome moment with his son, when little Billy joined his famous dad onstage at a Beach Boys concert July 5. Stamos, 60, proudly posted a video of the father and son duo to ...