The actress worked with Bhansali in "Black".
"I will always be there for him. He is my good friend and favourite director. This is his debut on television and I wish him good luck," Rani told reporters at the show's launch Thursday.
"I want everyone to watch this show. I am sure that like his films 'Devdas', 'Hum Dil De Chuke Sanam', 'Black' and others, even this show will be spectacular," she added.
The show, set to go on air on Star Plus starting Feb 25, is based on Govardhanram Madhavram Tripathi's Gujarati novel of the same name.
"This show means a lot to me as we have worked hard on the show. I am happy Rani came for unveiling the poster of my show. She gave a superb performance in 'Black' and she is the best actor I have worked with," said Bhansali.
About his foray into the small screen world, he said: "Television is not easy at all. Actors and directors have their own different demands.
Small screen is becoming bigger than big screen. We have made this show for the current audiences. We have made some changes so that the people accept it." His show features Gautam Rode and Jennifer Winget in key roles.