Whoa! Kate Bosworth Shows Off Tiny Waist, Flat Abs in Cropped Top

Kate Bosworth on the set of "Homefront" on October 18, 2012 in New Orleans, Louisiana. PacificCoastNews.com

Kate Bosworth isn't afraid to show a little skin — for the sake of her craft, at least.

The 29-year-old actress donned a striped, cropped tee on the New Orleans set of her new film, Homefront, Thursday, revealing her teeny, tiny waist and toned stomach. (The rest of her outfit was just as casual as the cotton tee she wore — Bosworth also sported minimal makeup, jeans and a brown leather belt.)

During her downtime on set, Bosworth visited with her fiance, director Michael Polish, who popped the question earlier this summer with an impressive, square-cut bauble.

The pair, who met on the set of Big Sur (out later this year), first made their debut as a couple at a Coldplay concert in August 2011. One year later, Bosworth quietly confirmed their engagement, referring to Polish, 41, as her "fiance" in a blog post for Vogue.

A few weeks later, however, the blonde beauty took to her WhoSay page to properly share their happy news — and show off her engagement bling.

"Thank you for all the wonderful engagement wishes," she wrote. "We feel truly blessed."

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