The 33-year-old dusky beauty will be seen in the third installment of Vikram Bhatt's horror thriller along with Emraan Hashmi.
"Getting goose flesh as I head to dub for 'Raaz3'! Its going to be crazy recreating the madness of the scenes at the dub!," she wrote on her Twitter page.
Basu started her Bollywood career with 'Ajnabee' but got her first box office hit with the first installment of the film.
The 3D film is slated for September 7 release.