Hidden Letters is a 2022 documentary film directed by Violet Du Feng. It follows the lives of two Millennial Chinese women who study Nüshu, a script used exclusively by women in Jiangyong County, Hunan province, to communicate and commiserate over Chinese patriarchy.

The film premiered on 6 June 2022 at the Tribeca Festival. It received critical acclaim for its exploration of the resonances between the historical and modern role of women in Chinese society, although a few critics wished for additional historical background. It was shortlisted for the 95th Academy Awards in the documentary category.