Timothy Tjahjanto (; born 4 September 1980) is an Indonesian filmmaker known for his film works mostly on the horror and action genres. Tjahjanto owns the film production company Merah Production.

Apart from directing, producing, and writing story for his own films, Tjahjanto is also known as one half of The Mo Brothers with friend and fellow filmmaker Kimo Stamboel. The duo received a Citra Award nomination