Despite Alexander’s acting and performing experience there is no discussion of acting in his books. See Stage Fright for brief references to stage fright in his writings and lectures.
The Alexander Technique was taken up by acting colleges, first in London in the 1960s, and has since been taught, either individually or in groups, at many acting colleges, predominantly in the UK and the US. Many actors use or have used the Technique. The literature is extensive.
The Alexander Technique For Actors by Kelly McEvenue contain warm-up exercises, drama exercises; it relates...