"We did a small puja to mark the beginning of our film Manam. (It was) an emotional day for all of us. (I) wish mother was there," posted Nagarjuna on his Twitter page Monday.
Annapurna, who was married to Nageswara Rao for 62 years, passed away in 2011. Annapurna Studios established in 1976, was named after her.
"This will be a dream project for us as it will see our entire family come together and work. I'm really looking forward to work with my father and son," said Nag recently at an event.
Manam, which will be helmed Vikram Kumar, also features Shirya Saran and Samantha Ruth Prabhu. Touted to be a family comedy, shooting of the film will begin from June 7.
It will be produced under Nagarjuna's home banner.