Tilda Swinton plays the frustrated mother of Kevin, who struggles with his lack of attachment, violence and mind games. She has trouble convincing her husband how bad it is, as he tends to see the (supposedly) good side of him, with dire consequences for the whole family and local community. We Need To Talk About Kevin is different from the book in some ways, but has been done in a way that was interesting, but does not deviate from the books lurking menace. Swinton and the two older Kevin's are all superbly acted, but the pot smoking posh boy that is Ezra Miller should take most of the credit, as his brooding presence dominates the later parts of the film. Great stuff (but not exactly cheerful!).