Dead of Winter (1987)

Katie McGovern is a struggling actress living with her husband and her student brother, who is visiting. She attends an audition that she found in the paper and is selected to shoot a short video which will be sent to the director for his approval. Mr. Murray, the man holding the audition, picks Katie up and takes her to a remote mansion where they shoot the video. Katie is selected to replace the previous lead in the film who looks remarkably like her. Soon, however, things begin to look as if they are not what they seem. Katie soon realizes she is in danger and attempts escape.