Marianne Deborah Williamson is an American author, speaker, and politician. She began her professional career as spiritual leader of the Church of Today, a Unity Church in Warren, Michigan. Williamson has written several self-help books, including A Return to Love: Reflections on the Principles of A Course in Miracles in 1992, which became a New York Times Best Seller. She was launched into prominence by Oprah Winfrey, being a frequent guest on her daytime talk show and becoming known as her "spiritual advisor".

Oprah Gail Winfrey, also known mononymously as Oprah, is an American talk show host, television producer, actress, author, and media proprietor. She is best known for her talk show, The Oprah Winfrey Show, broadcast from Chicago, which ran in national syndication for 25 years, from 1986 to 2011. Dubbed the "Queen of All Media", she was the richest African-American of the 20th century and was once the world's only black billionaire. By 2007, she was often ranked as the most influential woman in the world.