Born 1963. Graduated in screenwriting at the National Film School of Denmark in 1996. Horsten has written a number of scripts including "Kalder Katrine"/"Calling Katrine" and "Bror min bror"/"Teis and Nico" (Henrik Ruben Genz, 1998), which was awarded as Best Short Film at the Berlin Kinderfilmfest and the Chicago International Children's Film Festival and was nominated for an Oscar Award in 2000.
| Title | Year | Function | Category |
|---|---|---|---|
| Gidseltagningen | 2017 | Screenplay | TV series |
| Kampen om tungtvannet | 2015 | Script | TV series |
| The Idealist | 2015 | Script consultant | DK/Feature |
| The Shooter | 2013 | Screenplay | DK/Feature |
| Jelly T | 2012 | Script | DK/Feature |
| The Killing III | 2012 | Main screenwriter | TV series |
| Freddy Frogface | 2011 | Co-writer | DK/Feature |
| The Killing II | 2009 | Main screenwriter | TV series |
| 2900 Happiness | 2007 | Direction | TV series |
| The Killing | 2007 | Main screenwriter | TV series |
| Op med humøret | 2005 | Direction, Script | DK/Short fiction |
| Little Daddy | 2003 | Direction, Script | DK/Short fiction |
| 3017-3047 - Fra en samling af numser | 2002 | Direction | DK/Experimental |
| Nikolaj og Julie | 2002 | Direction, Script | TV series |
| At the Faber | 2000 | Direction, Script | TV series |
| Kikser | 2000 | Direction, Script | DK/Short fiction |
| Ernst i svømmehallen | 2000 | Script | DK/Short fiction |
| Ernst på skøjter | 2000 | Script | DK/Short fiction |
| Bror, min bror | 1999 | Script | DK/Short fiction |
| Tilbage til byen | 1999 | Direction, Script | DK/Short fiction |
| Cross roads | 1995 | Script | DK/Short fiction |
| Filmskolen | 1995 | Script | TV film |
| - kalder Katrine! | 1994 | Script | DK/Short fiction |
| Farmor fylder 80 | 1990 | Direction, Cinematography, Editing, Sound | DK/Documentary |