(Cover) - EN Showbiz - Natalie Portman's post-baby body has been seen for the first time since giving birth.

The Black Swan star welcomed her son Alef back in June but has been keeping a low profile since then.

Natalie and her fianc Benjamin Millepied were seen out last week for the first time and the actress was then later pictured taking her dog for a walk.

She was dressed casually in just sweat pants and a long sleeve shirt but she appears to be back to her slender shape in record time.

Natalie told Us Weekly that she had been "swimming every day" during her pregnancy to keep fit.

Just before she welcomed her son, the 30-year-old Oscar winner said that she would be "out of the public eye after [the baby's born].

She and Benjamin, a 33-year-old choreographer, met on the set of Black Swan last year and announced their engagement and her pregnancy in January.

Baby Alef's name is taken from the first letter in the Hebrew alphabet and also represents the "oneness of God".

Natalie was born in Jerusalem but has dual American-Israeli citizenship. (C) Cover Media