Filming for Wer began in May 2012 in Bucharest, Romania, and William Brent Bell shot the movie concurrently with another project, The Vatican.
The word "werewolf" is used three times in the movie: once in a news report Gavin is watching online, once spoken by Eric, and the very last line of the movie as spoken by Gavin.
Vic Sahay initially debated whether or not to take the role of Eric Sarin due to a busy schedule, but ultimately decided to join because the character and the movie's world "were just too interesting to walk away from".
Sarah-Jane Mee's debut.
Sarah-Jane Mee was born in Birmingham. England, UK.