Reese Witherspoon pregnant with third child? Gareth Cattermole / Getty Images file Reese Witherspoon in London in January. When Reese Witherspoon turns 36 this Thursday, she'll definitely have something extra to celebrate: A baby on the way! As multiple sources confirm exclusively in the new Us Weekly, out now, the Oscar-winning actress is pregnant with her third child, and her first with second husband Jim Toth, who she wed last March at her $7 million ranch in Ojai, Calif., after over a year of dating. PHOTOS: Reese's body over the years "Reese is right around 12 weeks," one source explains, adding that the "This Means War" star is "not planning to announce it." The baby-to-be will join older siblings Ava, 12, and Deacon, 8, Witherspoon's kids with first husband Ryan Phillippe, from whom she split in 2006 after 7 years of marriage. Pals of Witherspoon and high-powered CAA agent Toth, 41, aren't shocked by the happy news. "Reese and Jim have been trying to get pregnant," one pal says. PHOTOS: Reese, Jim and her kids -- happy family! And now that the A-list couple are breaking the news to a small circle of friends, their baby joy is obvious. "The timing is right," one source says. She's so happy! PHOTOS: Reese and Jim's whirlwind courtship For much more on Witherspoon's pregnancy -- how Ava, Deacon and their dad Ryan Phillippe reacted, how Toth is gearing up for first-time fatherhood and Witherspoon's plan for "time off" -- pick up the new Us Weekly, on stands Friday!