Complex sentence: At age six, when Hathaway watched her mother perform in "Les Misérables" as Fantine, she instantly became fascinated with stage, but her parents were not keen on allowing her to pursue an acting career.
Split into simpler sentences: At age six, when Hathaway watched her mother perform in "Les Misérables" as Fantine. She instantly became fascinated with stage, but her parents were not keen on allowing her to pursue an acting career.