Reese Witherspoon

Oscar winner Reese Witherspoon is pregnant with her third child, according to Us Weekly.

Witherspoon is about 12 weeks pregnant, according to the magazine. Emails to her reps were not immediately returned.

The actress, who turns 36 on Thursday, married Hollywood agent Jim Toth in March 2011 in a private ceremony at Witherspoon's Ojai, Calif., ranch. This would be the couple's first child.

Reese Witherspoon and Jim Toth wed

Witherspoon has two other children — 12-year-old daughter Ava and 8-year-old son Deacon — with her ex-husband Ryan Phillippe. The two divorced in 2007 after seven years of marriage.

Witherspoon is currently starring in the romantic comedy, This Means War.