Filmmaker Onir says actress Raveena Tandon will leave the audience stunned with her performance in his upcoming directorial venture "Shab". Raveena, who made a guest appearance in last year's "Bombay Velvet", will be seen in a full fledged role in this film. When asked if "Shab" will be Raveena's comeback film, Onir said, "Yes it will be, because she had a small role in 'Bombay Velvet'. I genuinely feel she is an incredible actress and I was wanting to work with her on this film since a long time. She will surprise everyone with her performance in the film." "Shab", a Delhi set drama, is a love triangle and also stars actor Prosenjit Chatterjee's wife Arpita and Ashish Bisht, both in their Bollywood debut role. Onir's next production venture, "Chauranga", is scheduled to release on January 8.