Martina Gedeck is a German actress. She achieved wider international acclaim due to her roles in films such as Mostly Martha (2001), The Lives of Others (2006), and The Baader Meinhof Complex (2008). She has won several awards, including 2 Deutscher Filmpreis, in 1997 for Supporting Actress in Life is All You Get, and in 2002 for Actress in Mostly Martha.

The Lives of Others is a 2006 German drama film written and directed by Florian Henckel von Donnersmarck marking his feature film directorial debut. The plot is about the monitoring of East Berlin residents by agents of the Stasi, East Germany's secret police. It stars Ulrich Mühe as Stasi Captain Gerd Wiesler, Ulrich Tukur as his superior Anton Grubitz, Sebastian Koch as the playwright Georg Dreyman, and Martina Gedeck as Dreyman's lover, a prominent actress named Christa-Maria Sieland.