Mark Allen Shepherd

 is an American television actor born in Rockville Centre, New York on January 7th, 1961. He is best known for playing the soft-spoken, yet chatty bar patron Morn on the syndicated sci-fi series Star Trek: Deep Space Nine. He has also played Morn in one episode of Star Trek: The Next Generation and one episode of Star Trek: Voyager. Aside from actor John de Lancie, Sheppard is the only non-billed Star Trek cast member to appear on all three programs.