Watch 123Movies. Through a more personal and conversational style of documentary, Thelonious Monk – American Composer was the first fully rounded portrait of this terribly misunderstood man and musician. He was the pianistic ringleader of the bebop revolution and, after Duke Ellington, jazz' first major composer. Thelonious Sphere Monk – a most original talent – remained a highly productive musician after more than thirty years of musical activity and continued to be a growing artist, exploring his art and extending his range.