Magnus von Horn, (born 21 December 1983, Gothenburg), is a Swedish-Polish^[1][2] film director and screenwriter. 

Horn graduated from the National Film School in Łódź in 2013.^[3] A few months after he arrived in Poland he was brutally robbed, which resulted in him becoming interested in violent people. His first film was a short documentary about a young Polish criminal.^[4] His 2011 short film Without Snow was nominated for the Guldbagge Award for Best Short Film.^[5] His debut feature, The Here After, premiered in the Directors' Fortnight of the 2015 Cannes Film Festival.^[6]

His sophomore film, Sweat, was selected for the 2020 Cannes Film Festival, which was cancelled due to COVID.^[7] His third feature, The Girl with the Needle, premiered in the 2024 Cannes Film Festival in competition for the Palme d’Or.