Channing Tatum’s ex wife Jenna Dewan has given birth to a baby boy, which is her first child with actor fiancé Steve Kazee.The 39 year old announced the birth of her son Callum Michael Rebel Kazee, who was born on Friday 6 March, with an intimate black and white photo on Instagram. Jenna’s share shows her cradling her newborn son who is wrapped in a blanket and wearing a hat.