Popular Tamil actor Sarath Kumar has landed a pivotal role in director Boyapati Srinu's yet-untitled next Telugu directorial, a source said.Starring Bellamkonda Srinivas in the title role, the film is slated to go on the floors from November."Sarath has been signed on for an important role. Contrary to reports, he's not playing the antagonist," a source from the film's unit told IANS.While the rest of the cast is yet to be finalised, there are rumours that Rakul Preet Singh will be playing the leading lady.The film is tipped to be an action thriller.