Wow! Jennifer Aniston Flaunts Cleavage in Plunging, Backless Dress

Credit: Jon Kopaloff/FilmMagic

Jennifer Aniston, who's known for her extensive collection of LBDs, finally stepped out of the style box on Monday night.

The actress, 42, wore a super sexy sequin mini dress by Kaufmanfranco, which featured a plunging neckline and an open back to Elle's Women in Hollywood Tribute bash in Beverly Hills.

She accessorized with matching Balenciaga strappy sandals and a Ferragamo clutch, plus jewels from Fred Leighton.

Aniston was honored at the event among many other A-listers including Reese Witherspoon, Freida Pinto and Evan Rachel Wood.

The Horrible Bosses star was joined by her beau, 40-year-old actor Justin Theroux. The duo moved to New York City's West Village in mid-September and are frequently spotted in coordinating outfits.