Kate Bosworth & Michael Polish: Theory Twosome!

Kate Bosworth and her fiance Michael Polish attend the Theysken’s Theory Spring 2013 fashion show during Mercedes-Benz Fashion Week on Monday (September 10) in New York City.

The 29-year-old actress was also joined at the show by Rock of Ages actress Julianne Hough, who was red hot at the Caroline Herrera show earlier that day.

PHOTOS: Check out the latest pics from New York Fashion Week

Over the weekend, Kate was joined by Michael at the Altuzarra fashion show.

25+ pictures inside of Kate Bosworth and Michael Polish at the Theory show…