Rachel Weisz walking by herself downtown ... Liev Schreiber carrying his son Alexander on Lafayette Street ... Natalie Portman on the set of her new film ... Jeff Goldblum leaving ABC studios after an appearance on Regis & Kelly ... Salma Hayek carrying her daughter Valentina ... Ed Westwick walking to the Gossip Girl set in Harlem ... Jamie Oliver, Bill Cosby, Taylor Swift, and Ted Turner posing for photos outside the Letterman show ... Taylor Momsen walking with friends in Greenwich Village ... and Danny DeVito leaving Da Silvano with his kids.