The 56-year-old actress made her Bollywood debut with Rishi in "Bobby" (1973) and he is said to be one of those people she looks up to for an opinion.
"Dimpleji is very keen on 'What The Fish' and is slightly nervous too. She has always shared a great rapport with Rishiji. So she wanted him to be one of the first people to see the movie along with her family," a source close to the film, told IANS.
Releasing Dec 13, "What The Fish", directed by Gurmmeet Singh, features Dimple in a lead role.
"Also, Aarav (her grandson) has never seen any of her movies, but she will make sure he watches this one," the source added.
Aarav is the son of Dimple's daughter Tina aka Twinkle, who is married to Bollywood star Akshay Kumar. Dimple, who was married to late superstar Rajesh Khanna, has another daughter Rinke.