Lawrence G. "Larry" DiTillio is an American film and TV series writer. He is most famous for his role as executive story editor of the science-fiction series Babylon 5, and for writing or co-writing most of the episodes in the animated series Beast Wars. He also was one of the famous writers on both the original He-Man and the Masters of the Universe and the 2002 series.

He is also the author of several tabletop roleplaying supplements, including Origins Award-winning adventure Masks of Nyarlathotep.