Jenna Dewan-Tatum the actor's wife of three years, is pregnant, their rep tells Us Weekly. "Jenna Dewan-Tatum and Channing Tatum are pleased to announce that they are expecting the birth of their first child next year." "It was a total surprise," an insider tells Us of the pregnancy, adding that Tatum, 32, is taking a full year off to be with his expectant spouse and their baby-to-be, due sometime in 2013. (Incidentally, the 21 Jump Street actor told Entertainment Weekly recently that he wanted to step back from acting to focus on a few behind-the-scenes projects with his production partner, Reid Carolin, who wrote the screenplay for Magic Mike.) The couple met on the set of Step Up in 2006 and married in Malibu, Calif., on July 11, 2009. Earlier this year, Dewan, 32, opened up to Us Weekly about their plans for a family.