Great news for the pair, as they have welcomed their second child into the world, a baby girl.
According to E! News, Amalia Millepied was born on February 22nd, but the news has only just been revealed, as the couple wished to remain private on the birth.
Speculation had mounted surrounding the star when it was said she would be skipping the Oscars on February 26th due to her pregnancy. But, she was in fact looking after her daughter.
Natalie and Benjamin who met on the set of Black Swan are also parents to a five year old boy, Aleph.