Bosworth, 30, and Polish, 42, wed at The Ranch in Rock Creek, located in Phillipsburg, Mont. Bosworth, wearing a strapless gown and her hair pulled back, arrived via a stage coach which was pulled by two horses.
The couple met in 2011 on the set of the film Big Sur, which Bosworth starred in and Polish directed. They got engaged in August 2012 during a trip to South Korea.
This is the first marriage for Bosworth, who previously dated Orlando Bloom and Alexander Skarsgaard. Polish was previously married to make-up artist Jo Strettell, with whom he has a teenage daughter, Jasper.
Bosworth and Polish collaborated on a second film, the upcoming thriller Unconscious. She will also be seen in the action film Homefront, which hits theaters in November.