I Swear (film)

I Swear is a 2025 British biographical drama film directed, written, and produced by Kirk Jones. It is based on the true life story of John Davidson, a Scottish man with severe Tourette syndrome who was the subject of the 1989 television documentary John's Not Mad. The film stars Robert Aramayo as Davidson, alongside Maxine Peake, Shirley Henderson, and Peter Mullan in supporting roles. Scott Ellis Watson makes his acting debut as a young Davidson.

I Swear premiered at the 2025 Toronto International Film Festival on 7 September 2025, and was released in the United Kingdom by StudioCanal on 10 October 2025. It was acclaimed by critics, who praised the performances of Aramayo and Mullan. The film received five nominations at the 79th British Academy Film Awards, winning two, including Best Actor in a Leading Role for Aramayo.