Hailey Bieber and husband Justin Bieber's baby boy, Jack, is officially 1! Hailey, 28, celebrated the milestone via Instagram on Friday, August 22, sharing never-before-seen photos with her son. "1 year of you my beautiful boy," Hailey captioned the social media tribute. "Happy 1st Birthday Jack Blues, you are joy personified." In the first photo, the Rhode founder has a big smile on her face while lying on the ground with Jack in her arms.