The white horse Rachel Weisz rides in the film had been trained for the TV series Game of Thrones (2011) and was taught to 'play dead' when its rider tugged hard on the left rein. Being unaware of this, at one point Rachel got partially trapped under the horse's left flank for a brief period after it rolled over onto its left side.
Philip's feverish nightmares were shot with a hand cranked 35mm camera.
The crew decided on only two main dresses for the Rachel character, since she was not at home in Cornwall.
For this role, Rachel Weisz had to learn to ride a horse side-saddle, a feat made more challenging by her costume.
The pearls used in the story were made for the film, based on an 1835 painting.