Emmy Hennings (born Emma Maria Cordsen, 17 January 1885 – 10 August 1948) was a performer and poet. She was also the wife of celebrated Dadaist Hugo Ball. Despite her own achievements, it is difficult to come by information in English about Hennings that is not directly related to her relationship with Hugo Ball. Several biographies of Hennings have been published in German.
Hennings was born in Flensburg, German Empire, describing herself later as "a seaman's child".
After the end of her first marriage in 1906, Hennings was an itinerant performer, travelling over much of the European continent. She was a performer at the Cabaret Simplizissimus in Munich, when she met Ball in 1913.
At the time, Hennings was already a published poet, whose works had appeared in left-wing publications called Pan and Die Aktion. In 1913 she also published a short poetry collection called Ether Poems, or Äthergedichte in German. Later, Hennings was a collaborator to the magazine Revolution, which was founded by Ball and Hans Leybold.
Hennings and Ball moved to Zurich in 1915, where they took part in the founding of the Cabaret Voltaire, which marked the beginning of the Dada movement. Hennings was a regular performer at the Cabaret Voltaire. Her performances included a role in Das Leben des Menschen (the Life of a Man), in which she appeared with Ball. This was the German premiere of the play by Leonid Andreev. Hennings also performed in a piece written by Ball, called Krippenspiel. After the Cabaret Voltaire ended, Hennings and Ball toured, performing mostly in hotels. Hennings sang, did puppetry, and danced to music composed by Ball. She also recited her own poetry. In 1916 Ball and Hennings created Arabella, their own ensemble troupe, where Hennings performed under the name Dagny. Hennings married Ball on 21 February 1920. Although they had no children together, Hennings had a daughter, Annemarie, from a previous relationship. Hennings, who outlived Ball by two decades, lived in Magliaso, Switzerland from 1942 to 1948. She died at a clinic in Sorengo, Switzerland.