Gretchen Craft Rubin is an American author, blogger, and speaker with a relentless curiosity about human nature. She believes that understanding ourselves and what works for us can lead to changes in our habits and lives. Rubin is a highly acclaimed writer, celebrated for her ability to simplify and express complex ideas from various domains with both humor and clarity. She is an adept user of new tools and platforms, and has built an extensive, passionate following.

After beginning her career in law and clerking for Supreme Court Justice Sandra Day O'Connor, Rubin realized her true passion was writing. She is the author of several New York Times bestselling books such as The Happiness Project, Better Than Before, and The Four Tendencies. Rubin's latest book is Life in Five Senses. Her books, which explore human behavior and happiness, have been translated into more than thirty languages and sold millions of copies worldwide.

Rubin is the host of the popular podcast Happier with Gretchen Rubin, where she discusses happiness and good habits with her sister Elizabeth Craft. Her Happier app and various happiness-boosting products demonstrate her innovative approach to helping others lead more fulfilling lives.

Her work has led her to be interviewed by Oprah, dine with Nobel laureate Daniel Kahneman, and walk with the Dalai Lama. Rubin's insights into human behavior extend to her "Four Tendencies" framework, designed to help individuals understand and manage their responses to expectations.

Raised in Kansas City and a graduate of Yale and Yale Law School, Rubin resides in New York City with her family. She is a left-handed, red-haired, and an avid fan of children's literature, organ donation, and high-intensity weight training, with a penchant for coffee and a very low-carb diet. Despite her varied interests, Rubin proclaims she has no hobbies other than reading, writing, and self-experimentation. Her sister affectionately refers to her as a "happiness bully."