Natalie Portman Credit: Dior

Mrs. Benjamin Millepied is tres sexy!

Natalie Portman, who gave birth to son Aleph in June of last year and wed beau Millepied earlier this month, goes topless and gives the camera a seriously sultry stare in a just-released new ad for Dior beauty.

Reclining on a stylish couch, Portman, 31, shows off her figure in the promo for Rouge Dior Nude Lipcolor, which features eight new shades.

Portman's fave? Grege #169. Proceeds of the shade will benefit the Free the Children Association.

"I chose the color Grege because it's the one I'd wear myself," the Oscar winner says in a statement. "The number [169] contains different dates that are important to me and my family."

The Oscar-winner and dancer-choreographer Millepied, 35, exchanged vows Aug. 4 in a traditional Jewish ceremony overlooking the Pacific Ocean in Big Sur, Calif. "Natalie has never been happier," a source told Us.