The 38-year-old Jennifer Lopez who is married to singer Marc Anthony, delivered her first child just after midnight in a hospital in Long Island, manager Simon Fields told Reuters.
"They are healthy, happy and excited," said Fields of the new family.
The torque of 5.7 pounds daughter was born first, followed by a son of 6.0 pounds. The two have yet to be appointed.
Jennifer Lopez's efforts to have a child filled tabloid pages in recent years. Anthony, 39, salsa singer, has a daughter and two sons from two previous relationships.
Celebrity magazine People would offer upward of 6 million United States dollars for the exclusive rights to the first pictures of the baby, a garnish reported $ 4 million paid out for the North American magazine for the rights of photos of Angelina Jolie and Brad Pitt's baby daughter Shiloh.
New York-born Lopez, which has sold 17 million copies around the world and released six albums, married Anthony, who has sold more than 10 million records in 2004. This is his third marriage.
The couple featured in concert last year in "El Cantante," a film about salsa legend Hector Lavoe.