Deschanel works her throwing arm while filming New Girl in L.A. Plus: Zac Efron, Jennifer & Violet, Natalie Portman and more

Credit: Sharpshooter Images / Splash New Online

Updated: Thursday Jan 24, 2013 | 06:00 AM EST

AND … ACTION!

Chilly temperatures can't slow down Zac Efron, who stays in character Thursday on the New York City set of his latest film, Are We Officially Dating?