I Swear is a 2025 British biographical comedy-drama film directed, written, and produced by Kirk Jones. It is based on the true story of John Davidson, who was diagnosed with Tourette's syndrome, and also features the process of the securing and filming of the 1989 television documentary John's Not Mad, at a time when his condition was barely identifiable. The film stars Robert Aramayo, Maxine Peake, Shirley Henderson, and Peter Mullan.

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.

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