Stars and Their Pets: Natalie Portman's Stair MasterPortman takes it one step at a time with Whiz in Los Feliz, Calif. Plus: Josh Duhamel and his dachshund get a move on in L.A. and more

NATALIE PORTMAN

The Oscar winner and her main man, pooch Whiz, 'step' to it in Los Feliz, Calif., on Friday.