"If you all want to see the lady James Bond, then I am right here," said Vidya - without revealing much - when asked about "Bobby Jasoos".
To be directed by Sameer Shaikh and produced by Dia Mirza and Sahil Sangha, "Bobby Jasoos" will go on floors by mid-November.
Looking slimmer, the actress said the weight loss was for "Shaadi Ke Side Effects".
Vidya said: "For 'Dirty Picture' and 'Ghanchakkar' I had to gain weight. In 'Shaadi Ke Side Effects' I play a urban girl and the film demanded a particular body type, so I have lost the weight that I gained for my previous films."
"Shaadi Ke Side Effects" will see the fresh pair of Viday and Farhan Akhtar. The actress was all praise for her co-star.
"I have seen 'Bhaag Milkha Bhaag' and the perfection and dedication Farhan has done for the film is commendable. I am a huge fan of Farhan Akhtar. There is so much to learn from him."