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Natalie Portman's First Outing Since Bringing Home Baby

08/22/2011 at 02:00 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.

RELATED: Natalie Portman & Whiz: Best Friends for Life

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.

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