INTRODUCING BABY JACK JUSTIN BIEBER AND WIFE HAILEY ARE OVER THE MOON AS THEY RELISH THE FIRST PRECIOUS DAYS WITH THEIR SON

Baby Bieber is here! Three months after sharing their exciting pregnancy news with the world, Justin and Hailey Bieber are "overjoyed" to reveal that they've welcomed their first child together.

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Taking to Instagram to introduce their newest family member, proud dad Justin could hardly contain his excitement as he wrote "WELCOME HOME JACK BLUES BIEBER." The caption was paired with a sweet snap of Hailey, 27, holding the infant's tiny foot in her hand.

The pop star's mom, Pattie Mallette, was quick to share her joy on social media, writing, "Congratulations, Justin and Hailey.