Natalie Portman made an appearance on the ‘Late Show with David Letterman’ last night to promote her new movie, “Black Swan.”

Natalie told Letterman that she had to lose a fair bit of weight for the role, “I think I lost like 20 pounds, I mean I’m 5ft 3in so it was pretty extreme. I am back at my healthy weight now, I like eating so I waited until the very end to do the diet part.”

She looked very healthy on the show glowing in a fruity lemon Valentino Resort 2011 dress.

The tiered chiffon dress with a black beaded neckline and a sash tied to the waist was paired with black patent pumps.

As always another totally adorable look from Natalie.

Credit: Style.com