Natalie Portman, who won a best-actress Oscar this year for playing a demented ballerina in Black Swan, has given birth to her first child, a boy, reports People magazine. This is the first child for Portman, 30, and fiancéBenjamin Millepied, 33, who met and began dating while shooting Swan, which Millepied choreographed. Portman, who has always kept mum about her personal life, announced her pregnancy in December and added, for good measure, that she was engaged to Millepied — a French dancer with the New York City Ballet— as well. In her best actress Oscar acceptance speech in February, she thanked \"My beautiful love, Benjamin Millepied … who has now given me my most important role of my life.\" During awards season, the pregnant Portman walked endless red carpets, collecting awards while also promoting her January comedy No Strings Attached. And no, her pregnancy didn\'t slow her down. \"It\'s the most private of experiences, so I\'d definitely rather be at home right now. But also, it\'s my job,\" Portmand said to USA TODAY in January. A few weeks before their baby was due, Millepied was effusive when discussing fatherhood with USA TODAY. \"I\'m going to take a lot of time off to enjoy this new stage of life that I\'m really looking forward to. It\'s the unknown and there\'s something so exciting when you know life one way and you can do all kinds of projects and exciting things, but this is going to be so different and new and I love that idea,\" he said. From USA Today