The `Buffy the Vampire Slayer` actress and her husband Freddie Prinze Jr. welcomed their second child - a brother for three-year-old daughter Charlotte Grace - last week, and both mother and baby are doing well. A representative told USMagazine.com: "Sarah Michelle and Freddie Prinze Jr are thrilled to announce that they welcomed a baby son into the world this past week. "Mother and baby are doing great. And Charlotte is very excited to be a big sister." A name for the baby is not yet known. Sarah and Freddie - who have been married for 10 years - were said to have been hoping for a baby boy earlier this year and were glad when a scan proved that to be the case. A source said: "Sarah was secretly hoping for a boy. She realises this will most likely be the last baby she has, so she`s so happy she`ll have the experience of raising one of each." The pair first met on the set of 1997 horror movie `I Know What You Did Last Summer`, and close friends have claimed they prefer family time to working. An insider added: "They both came of age in Hollywood and love working, but their home life is important to them."