The star put her most fashionable foot forward, showing off a slew of diverse looks while promoting her upcoming film, 'Drinking Buddies.' Which get-up did you like best? VOTE.

Olivia Wilde was very busy in NYC on Aug. 19 promoting her latest role in Drinking Buddies - however, the star still managed to pull more than one frock swap, taking her look from cool and casual to totally glam! In fact, we love her versatile sense of style so much we're having a hard time deciding which look is our favorite!

Olivia Wilde's 'Good Morning America' Outfit:

Olivia's first stop was Good Morning America, where the 29-year-old star looked stylish, appropriate, and chic in separates. The star tucked a plain black Crippin 'Alex' tee into a vibrant Clover Canyon 'Gold Panther' skirt. The fitted pencil skirt hugged Olivia's figure like a glove and looked great on her. Gold bangles, effortless waves, and Jimmy Choo 'Vamp' sandals finished off her first look of the day.

While Olivia looked so chic in separates, we also spotted the star going incognito in a dressed down get-up that consisted of jeans and a tee. Even though it was a casual look she still totally pulled it off and was so stylish from head-to-toe.

Olivia Wilde's 'Late Show With David Letterman' Dress:

The star swapped her separates for a more romantic summer dress when she arrived at the Ed Sullivan Theater for an appearance on the Late Show with David Letterman. Olivia selected a slightly sheer, white hot Theyskens' Theory frock from the Resort 2014 collection. The fitted waist flattered Olivia's frame while the tea length was a refreshing change on the star. Nude Christian Louboutin 'Croisilleta' sandals polished off the ensemble, while glossy lips tied the whole look together.

Olivia Wilde's 'Drinking Buddies' NYC Screening Dress:

While the stylish star looked lovely in her white dress it wasn't long before she swapped her frock for a sexy new look, stepping out in Brooklyn at Nitehawk Cinema for the Drinking Buddiesscreening, where she showed off a J. Mendel dress from the Pre-Fall 2013 collection. The racer-front dress featured cutouts on the side, a sexy addition to the flowing silhouette. I love the way the sexy features were balanced out by the A-line skirt and the longer hemline - the star looked amazing! She opted for the same pair of nude Christian Louboutin sandals she wore earlier that day.

Personally, I loved her Good Morning America get-up and her screening look, but what did you think? Did you have a favorite look on Olivia?

Which outfit do you like most on Olivia Wilde?
Her screening dress1 (25.0%)
Her casual jeans and tee1 (25.0%)
Her white 'Letterman' look1 (25.0%)
Her vibrant 'GMA' separates1 (25.0%)

More from Hollywood Life:
Olivia Wilde Goes Makeup Free On A Stroll In NYC
Olivia Wilde's Pretty Purple Eyeliner - Get The Look
Olivia Wilde On The April Cover Of 'Marie Claire' - Super Sexy

Photo Credit: Getty Images, FameFly Net