Natalie Portman wears a Proenza Schouler dress under a coat as she arrives at the Ed Sullivan Theater on Monday (November 22)

Natalie Portman wears a Proenza Schouler dress under a coat as she arrives at the Ed Sullivan Theater on Monday (November 22) to appear on an episode of The Late Show with David Letterman! http://nataliaportman.blogspot.com/

Once she went inside the building, the 29-year-old Black Swan actress changed into an outfit by Valentino for the show.

Last week, Nat stepped out for FINCA International’s 25th anniversary gala with Jake Gyllenhaal! Natalie is a huge supporter of the organization.