HOT TO DEF: Olivia Wilde Is Gorgeous In Black & "In Time" (PHOTOS)

Gorgeous actress Olivia Wilde looked chic, simple and sophisticated as she posed on the red carpet to celebrate the debut of her new film In Time in L.A. last night!

PHOTOS: Olivia Wilde Is Fresh Faced Without Makeup!

The 27-year-old House star plays Justin Timberlake's mother in the sci-fi thriller and we have to say, that is one hot mama!

Olivia donned a backless black dress with spaghetti straps designed by Israeli-American designer Yigal Azrouel.

The dress is from Azrouel's Spring 2012 collection and Olivia wore it stunningly, pairing it with strappy, black Louboutin shoes, a gold bracelet and a gold clutch.

In Time stars J.T. as a man on the run in society where age ain't nothing but currency. The film is set in a world where the ageing gene has been halted at the age of 25. The wealthy buy and trade in time, so the rich stay young and the poor die out. 

Even though Olivia and Justin are at the low end of the economic scale in the film, Liv must be doing something right, because she looks downright glowing and youthful!

Click through the gallery to see more photos of Olivia at the In Time premiere.

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Olivia Wilde In Yigal Azrouël At The "In Time" Premiere In L.A. (PHOTOS)