Reese Witherspoon pregnant with third child - report

Reese Witherspoon is prepping for a new role -- as a mother of three. Us Weekly reports that the Oscar-winning actress is pregnant with her third child -- her first with husband, Jim Toth, whom she wed last March.

"Reese is right around 12 weeks," a source tells the mag, adding that Witherspoon, 36, is "not planning to announce it."

Witherspoon and CAA agent Toth were reportedly trying for a baby, says one source.

The new little one will join Witherspoon's other children Ava, 12, and Deacon, 8, from her first marriage to Ryan Phillippe. The couple split up in 2006.