Jamie-Lynn Sigler and her fiance Cutter Dykstra welcomed a baby boy on Aug. 28 at 8 lbs., 4 oz. "Both mommy and baby are great!" her rep exclusively confirmed to Us. The Sopranos alum and baseball player first revealed her pregnancy to Us in February. "Jamie couldn't be happier," a source told Us. "Cutter is the perfect guy for her. Although they have only been together for a year, they both know that this is it for both of them. They are both on cloud nine, as are their families and friends."