Tiffany Lynn van Soest (born March 20, 1989) is an American Muay Thai kickboxer who competes in the bantamweight division. She is the current Glory Super Bantamweight Champion. In 2019, Combat Press voted her the Female Fighter of the Year. Originally a Shōrin-ryū karate practitioner, van Soest began Muay Thai at the age of eighteen and was both a state and national titlist as an amateur before turning professional in 2011.