bosworthpolish230.jpg Look at that rock!

Kate Bosworth unintentionally let the cat out of the bag earlier this year when she referred to her director beau Michael Polish as her "fiance" in a blog post for Vogue travel, and now the Blue Crush star is confirming the happy engagement news and showing off her enormous diamond on her WhoSay page.

"This photo was taken by my husband-to-be. Thank you for all the wonderful engagement wishes... we feel truly blessed," she wrote to her fans.

The pair, who have been dating for over a year, met on the set of their movie Big Sur.

The Straw Dogs actress dated Pirates of the Caribbean actor Orlando Bloom for several years before moving on with True Blood hunk Alexander Skarsgard, with whom she split in July 2011.

Congrats on landing Prince Charming, Miss Bosworth!