Reese Witherspoon - who has two children, Ava, 13, and Deacon, eight, from her previous marriage to Ryan Phillippe - and her husband Jim Toth welcomed Tennessee James into the world earlier today (28.09.12).
No other details have been released at the time of writing.
Last month, the 'Legally Blonde' actress spent a couple of days in a Los Angeles medical facility after it was feared she was going into early labour.
After being discharged doctors told her to take it easy at home and get plenty of rest.
Witherspoon - who married Toth in March 2011 after a year of dating - recently admitted she was planning a career break to raise her baby.