Megastar Chiranjeevi's much awaited 150th film, which is tentatively titled "Kathilantodu ", went on the floors here on Thursday."The shooting has started from today. The first schedule will be shot in a prison set that has been specially erected for the movie," a source from the film's unit told IANS.The film, which will be jointly bankrolled by Lyca Productions and Ram Charan, will be directed by V.V. Vinayak.The makers are yet to finalise the leading lady and rest of the cast.The project is the official remake of Tamil blockbuster "Kaththi", and it deals with issues plaguing farmers.Devi Sri Prasad has been roped in to compose the music.