Birth name Ellen June Evangeline Hovick. Canadian-born American actress, dancer, writer, and stage director.

Havoc was a child vaudeville performer under the tutelage of her mother Rose Thompson Hovick.She later acted on Broadway and in Hollywood, and stage-directed, both on and off-Broadway. She last appeared on television in 1990 in a story arc on the soap opera General Hospital. Her elder sister Louise gravitated to burlesque and became the well-known ecdysiast Gypsy Rose Lee.

Havoc was married three times & has authored books about her life.