Joe Otterson TV ReporterLaura Benanti has joined the ensemble cast of the Fox drama pilot “Big Leap,” Variety has learned exclusively.The one-hour project centers on a group of diverse underdogs from all different walks of life who compete to be part of a competition reality series that is putting on a modern, hip remake of “Swan Lake.” It is inspired by the UK docuseries “Big Ballet.”Benanti will play Paula Dirks, a tap dancer and white-collar former V.P.