Theodore Mook (born February 26, 1953, Mount Kisco, New York) is an American cellist who has played in more than 1,000 Broadway performances in New York City, produced records, played on motion picture soundtracks and, along with Ezra Sims, invented computer fonts used in microtonal music composition.

[5] In New York, Mook performed cello in Broadway shows Little Women, Bombay Dreams, Taboo and Jekyll & Hyde.

[6][7] Outside of New York City, Mook has performed at the Library of Congress, the American Academy in Rome, the Los Angeles County Museum of Art and John F. Kennedy Center for the Performing Arts, among other venues.

[4] He performed cello for the soundtracks for the Wendigo (film) and Space Cowboys.

[8] After moving to Charlestown, Rhode Island, Mook played alongside Grammy-winning artist Eugene Friesen.