John Gray (born December 28, 1951) is an American relationship counselor, lecturer, and author. In 1969, he began a nine-year association with Maharishi Mahesh Yogi before beginning his career as an author and personal relationship counselor. In 1992 he published the book Men Are from Mars, Women Are from Venus, which became a long-term best seller and formed the central theme of his subsequent books and career activities. His books have sold millions of copies.