Thomas Montgomery Gregory (August 31, 1887 – November 21, 1971) was a dramatist, educator, social philosopher and activist, historian and a leading figure in the National Negro Theatre Movement. Montgomery Gregory, a native of Washington, D.C., was key in cultivating and nurturing the concept of a National Negro Theatre Movement during the early decades of the 20th century against the backdrop of an 80-year-old minstrel tradition and the popularity of Black-themed dramatic works by white writers, underscored by the commercially fledgling efforts of Black playwrights in America.