Kirstie McLellan Day (born September 24, 1963) is a Canadian author, journalist and former television host. McLellan Day was the CEO of Pyramid Productions. McLellan Day served as executive producer and writer on the true-crime series The Shocking Truth and Sex, Lies & Murder, made in conjunction with U.S. broadcaster Reelz. Since focusing on writing, Kirstie McLellan Day has become one of Canada's most successful and prolific authors.