08/22/2011 at 01:00 PM EDT
Look who's back!
Since giving birth
to son Aleph in June, Natalie Portman
has been lying low, just as she promised she would
But on Thursday, the Oscar winner – who appears to have lost much of her baby weight – and her dog Whiz stepped out for the first time together since Aleph's arrival.
The pair kept their heads down as they walked the New York City streets in near darkness. Portman's frame stayed hidden under a loose oxford and sweatpants, but the actress added a touch of star power to her casual ensemble with some oversize sunglasses.