Witherspoon shares custody of daughter Ava, 12, and son Deacon, 8, with ex-husband Ryan Phillippe, 37, from whom she split in 2006 after 7 years of marriage.
Toth, 41, a high-powered CAA agent, and the Water for Elephants star in March 2011 at the actress' $10 million ranch in Ojai, Calif. (which Witherspoon recently put back on the market) after over a year of dating.
"Before Jim met Reese, he wasn't sure about having kids," a source told Us Weekly in March. "Being around her kids has really shown him what it's all about." Added another insider, "Settling down with Jim and raising a family is what [Reese] wanted."
It was definitely a working pregnancy for the star, who braved the hot summer temperatures in Georgia to film The Devil's Knot in July. Although Witherspoon was very visible around town, she spoke very little about the pregnancy.
"I'm feeling very round tonight," she said simply to the Chicago Sun Times on June 23. "After I finish [Devil's Knot], I'm going to take a little time off -- and go have a baby!" she added.