Camilla Martha Horn (25 April 1903 – 14 August 1996) was a German dancer and a film star of the silent and sound era.

In 1925, together with Marlene Dietrich, she worked as an extra in the German film Madame Wants No Children, and later she was seen in a musical review by director Alexander Korda.

She made her great breakthrough in 1926, when she replaced Lillian Gish as "Gretchen" in F. W. Murnau's UFA production of Faust.

She returned to Europe, and in the 1930s refused to follow the official line of the Nazis and was prosecuted for a monetary offense.

After the war the British tribunal at Delmenhorst convicted her for minor offenses (among them travelling without permission) and she was imprisoned for three months at the women's prison in Vechta.