The blonde beauty first appeared to let slip the big news on 26 December (12) after referring to the director as ""my hubby"" in a post on the social networking site, and now Polish has also alluded to marriage with a cheeky tweet.
When a fan from Argentina sent a photo of the Blue Crush star to Polish and asked, ""What do you think about this girl?"" he replied, ""Married it.""
Bosworth re-tweeted the message on her account and also shared a photo of a birthday bouquet her man surprised her with as she turned 30 years old on Wednesday (02Jan13), writing, ""What a beautiful way to start my bday! Thank you, Michael Polish.""
The romantic moviemaker then tweeted, ""Happy Birthday to my #1 on the #2 day of 2013. Kate Bosworth, I love you.""