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Newly-single Olivia Wilde (she recently filed for divorce from hubby of eight years, Tao Ruspoli) left an office building in West Hollywood yesterday looking quite different from her sexy Tron character. In fact, she kinda just looks like a regular girl in these pix!

And by "regular," of course we mean the abnormally cute, sexy Hollywood type of regular. But still, it's a look we don't see from her every day. You think Justin Timberlake's used to seeing her dressed down like this? Recent reports suggest he's seen her wearing a lot less!

The two co-star in the upcoming futuristic thriller Now and reports say they've been getting cozy off-screen recently, with a date at The Roxbury in Hollywood on April 2.

Olivia denied she and JT are hooking up when she tweeted, "Cool it, honeybadgers. We are just friends and have been for years." In fact, the two met on the set of Alpha Dog back in 2006.

You think these two will go public with their romance once Wilde's divorce is finalized???