India, April 19 -- Hollywood actor Natalie Portman has announced that she is expecting her third child at age 44. This will be her first child with boyfriend, French music producer Tanguy Destable. "Tanguy and I are very excited. I'm just very grateful. I know it's such a privilege and a miracle," she told Harper's Bazaar. As the daughter of a fertility doctor, the actor noted she possesses a 'keen awareness' of the difficulties many face when trying to conceive: "I grew up hearing about how hard it is to get pregnant. I have so many people I love who've had such a hard time with it that I want to be respectful around that as well. It's such a beautiful, joyous thing, and it's also not an easy thing. And so I know how lucky it is and I'm very grateful."The actor added that she is swimming and doing Gyrotonics to 'keep strong' while spending time with her older children. The Oscar-winning actor shares two children - Aleph, 14, and Amalia, 9 - with former husband, French choreographer Benjamin Millepied. htc...