Produced under ASA production banner, the film will also mark the directorial debut of Tinu Suresh Desai.
"The girl in the film belongs to a royal family and Prachi is someone who looks extremely classy and dignified. She has that allure of royalty," Vikram said on his decision to cast Prachi.
Prachi, who made a successful transition from TV to movies with projects like 'Rock On' and 'Once Upon A Time in Mumbaai', said, "I am glad Vikram and I are finally working together. The story blew my mind, it's never been seen before.
"His films have clearly touched the pulse of the audience and this will be my first thriller/horror movie and I'm very excited to be trying my hand at a different genre."
The film goes on floors in March 2013 and is to shot entirely in London.
