Inside the halls of an elite arts academy, a timid music student begins to outshine her more accomplished and outgoing twin sister when she discovers a mysterious notebook belonging to a recently deceased classmate.

Sydney Sweeney
as Juliet Lowe

Madison Iseman
as Vivian Lowe

Jacques Colimon
as Max

Ivan Shaw
as Dr. Henry Cask

John Rothman
as Roger

Rodney To
as Wilkins

JoNell Kennedy
as Gordon

Julie Benz
as Cassie Lowe

Brandon Keener
as David Lowe

Stephon Fuller
as Joshua
Repo Jack
"Nocturne" is another "Welcome to the Blumhouse" horror movie dropped together with three others on Amazon Prime. More of a B-movie version of "Black Swan" (or the slightly better "Perfection" on Netflix), the high school teen drama really weighs it down. And nothing very original either: someon...