Cassandra Lee Morris (born April 19, 1982) is an American voice actress. Having started her career as a teenage program host for an educational video series called Real World Science, she worked as a journalist in New York City and Los Angeles writing for local newspapers and programs as well as numerous fashion and style blogs such as, David's Bridal, and She got into voice-over starting with Alice and then Yubel in Yu-Gi-Oh! GX, and has since worked on a number of animation, anime, films, live action, and audiobooks. Some of her major anime roles include Ritsu Tainaka in K-On!, Leafa in Sword Art Online, Sue in Doraemon, and Taiga Aisaka in Toradora. In video games, she provides the voice of several main characters, including Totori in Atelier Totori: The Adventurer of Arland, Edea Lee in Bravely Default, Lin Lee Koo in Xenoblade Chronicles X, and Morgana in Persona 5.

She was the English voice of Misaki in FLCL Progressive.