Beautiful and impossibly svelte actress Kate Bosworth finally gets engaged to long-time boyfriend Michael Polish, and her ring is something to behold!

The pretty 29-year old Hollywood star shared a black and white picture of her diamond engagement ring via WhoSay, declaring that her fiancé took the photograph himself. The image shows Kate displaying a square-cut diamond ring on what seems to be either a silver or white-gold band.

A day after the proclamation, the coo-some twosome was seen stepping out for a walk in Soho, she in a short black dress and he in a sweater and jeans, holding hands and looking very happy. Kate proudly held up her left hand to hold the strap of her shoulder bag, giving paparazzi and casual observers alike a good look at her sparkling new diamond ring and making Tinseltown engagement-ring watchers wonder who created the bling (and how much it cost).

Last week, the actress Tweeted: “Thank you all for the wonderful engagement wishes… We feel truly blessed.” She and 41-year old indie film director Michael Polish had kept a relatively low profile on their dating life, but this recent turn of events found the actress describing him as “my fiancé” in a casual blog post for Vogue in early September. He is her director in the upcoming movie Big Sur. It has been reported that it was in the movie’s set that the two first met and started dating.

It was during a Coldplay concert in August 2011 when Kate showed up with Michael as a couple. Before Kate and Michael became an item, the actress dated high-profile actors such as Alexander Skarsgard of True Blood fame for two years before ending the relationship July of last year. She and English actor Orlando Bloom also had a four year on-and-off relationship that finally ended in 2006.