Catherine Elizabeth Coulson (October 22, 1943 – September 28, 2015) was an American stage and screen actress who worked behind the scenes on various studio features, magazine shows and independent films as well as acting in theater and film since the age of 15. She is best known for her role as Margaret Lanterman, the enigmatic Log Lady, in the David Lynch TV series Twin Peaks. Description above from the Wikipedia article Catherine E. Coulson, licensed under CC-BY-SA, full list of contributors on Wikipedia.