From Wikipedia, the free encyclopedia. Kimberly J. Brown (born Kimberly Jean Brown on November 16, 1984) Is an American actress. She is known for her role as Marah Lewis #3 on The Guiding Light and for her role as Marnie Piper on the Halloweentown series (1-3 only). Description above from the Wikipedia article Kimberly J. Brown, licensed under CC-BY-SA, full list of contributors on Wikipedia.