The Oscar-winning star gave birth to her first child, Jonathan Rosebanks Shulman, on March 24 in Los Angeles, according to celebrity news outlet E!
Ms Hathaway confirmed earlier this year that she and her husband, actor Adam Shulman, were expecting a baby by posting a photo on Instagram that revealed her baby bump. (Also Read: Anne Hathaway Debuts Baby Bump on Shopping Expedition)
US media, however, had already leaked the news in November.
Happy 2016 to my beautiful Instafriends! So, posting a bikini pic is a little out of character for me, but just now while I was at the beach I noticed I was being photographed. I figure if this kind of photo is going to be out in the world it should at least be an image that makes me happy (and be one that was taken with my consent. And with a filter :) Wishing you love, light and blessings for the year ahead!Annie
Ms Hathaway, 33, won an Oscar in 2013 for her performance as Fantine in Les Miserables.
Some of her other best-known films include the family-friendly comedy-drama The Princess Diaries in 2001 and the hit 2006 comedy The Devil Wears Prada.
Ms Hathaway married Mr Shulman, 35, in 2012.