Robin Weigert (born July 7, 1969) is an American actress. She is best known for portraying Calamity Jane on the television series Deadwood (2004–2006), for which she received a nomination for the Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series in 2004, Ally Lowen in Sons of Anarchy (2010–2013), Dr. Amanda Reisman in Big Little Lies (2017–2019), and Abby in Concussion (2013). Description above from the Wikipedia article Robin Weigert, licensed under CC-BY-SA, full list of contributors on Wikipedia.