In Lage Raho Munnabhai Vidya Balan was trained by RJ Malishka for her role.In Tumhari Sullu both the actors share the screen space as RJ's.
Not only the second time Vidya Balan plays the role of an RJ, after Lage Raho Munna Bhai, but, Just like in LRMB, Vidya Balan's Character was famous for her greeting style. In LRMB it was "Good Morninnnnnnnnnnnnng Mumbai" and in Tumhari Sulu it was "Hello(in a sexy voice)"
The film was shot in 35mm format which is quite rare.
While the shooting was in process.A promotional audio of Vidya Balan as RJ would play in Mumbai local trains.
Torex cough syrup had also made an advertisement of Vidya Balan playing and RJ and using Torex syrup to control her cough while the show is on air.