Natalie Portman threw on her jacket for a walk in NYC yesterday. She was out enjoying some warmth in the city, which was a great change from the frigid weather she's endured all Winter. Natalie's fiancé Benjamin Millepied is often by her side for her strolls, but this time she went out solo. She and Benjamin are apparently expecting a son, and Natalie has been staying in the Big Apple to prep for their special delivery. She skipped out on last Sunday's BAFTAs in London, where her Black Swan director Darren Aronofsky picked up her best actress statue. She will, though, head West in time for the Oscars, and all eyes will certainly be on the star and the dress she chooses for Hollywood's biggest night.