Charlize Theron has secretly adopted a baby girl, following her split with Sean Penn. This is the second child Charlize has adopted — she already has a son, Jackson. Well, this came out of the blue! Congratulations to Charlize Theron, 39, who is now a mother to a new baby girl! The Mad Max beauty secretly adopted another baby in July — a sister for her son, Jackson, 4, and we couldn’t be happier for her. The adoption comes just a few months after her breakup with actor and fiance Sean Penn, 54.