What is the fine-grained topic of the following text: For this film, producer Ram Charan is roping in star attraction to hike expectations on the film which already has Amitabh Bachchan, Vijay Sethipathi, Jagapathi Babu, Sudeep, Nayanthara and Pragya Jaiswal playing vital roles. Only return the topic.
Casting of a film produced by Ram Charan