Filmmaker SS Rajamouli has finally begun working on his upcoming film 'SSMB29', starring Mahesh Babu and Priyanka Chopra in lead roles.

According to reports, anything and everything about the film is being kept extensively under wraps, with the lead actors even having to sign a Non-Disclosure Agreement (NDA), preventing them from revealing anything.

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The director has gone far enough to enforce a 'no cell phone' rule on the set, highlighting the importance for him to keep it all a secret.

Rajamouli recently shared a cryptic post, where he holds a passport with the background showing the image of a lion behind bars. Many are speculating it to be a hint at Mahesh Babu's character in the film.

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Social media has gone crazy over the secrecy, with users expressing themselves online.

One user said, "Why so much secrecy? Now I have to know what's happening on that set. Rajamouli knows how to keep the hype real! #SSMB29."

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Another commented, "This much secrecy means only one thing - Rajamouli is creating another blockbuster. #SSMB29 better blow our minds!"

With public anticipation building up like crazy, it will be interesting to see what next bit is strategically revealed to keep the hype up.