Chloë Grace Moretz on tackling her role for 'Brain on Fire'

When journalist Susannah Cahalan's brain started betraying her, a sign of a rare form of encephalitis, she couldn't have imagined that she'd one day be premiering a film about her experience - and based on a book chronicling her breakdown and recovery - at the Toronto International Film Festival (TIFF). Here, star Chloë Grace Moretz speaks to Hello! about taking on the role of Susannah, while the writer and director Gerard Barrett talk about the young actress's dedication to the role.

Watch the video to see what they said!

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