Emma Stone attended the 90th Academy Awards in Los Angeles' Dolby Theatre wearing a surprising ensemble.

Emma Stone
Emma Stone wore a custom Louis Vuitton pantsuit

Styled by celebrity stylist Petra Flannery, the La La Land star wore a custom Louis Vuitton pantsuit with navy trousers, burgundy blazer and cerise pink bow.

Emma Stone
Actress Emma Stone attended the 90th Academy Awards  

Her hair, which she wore sleek and straight, was styled by Mara Roszak while her make up - which featured complimentary burgundy eye shadow and navy eyeliner - was applied by Rachel Goodwin.

The look was an unusual one for Ms Stone who has previously opted for classic Hollywood gowns when walking the Oscars red carpet.

Emma Stone
Emma Stone at previous Academy Awards

Last year, the Oscar winner wore a fringed Givenchy Haute Couture dress while in 2012, she chose a red Giambattista Valli gown.

Check out all the top looks from the Oscars red carpet here.

You can watch highlights from the 90th Academy Awards on RTÉ 2 tonight, Monday at March 5 at 9:30pm.