Kate Bosworth is engaged, but she didn't mean to announce the happy news, it was just an accident. Kate was just blogging and let it slip. She was writing about her and boyfriend Michael Polish's recent vacation. She was describing a trip to South Korea, when she writes, that on their first day my fiance and I ventured out. The 29 year old then continues on to describe the trip by detail, but no mention of an engagement or anything else.