Brian Nelson is an American screenwriter.
Nelson holds degrees from Yale University and from UCLA. He worked as a drama instructor at Langley High School in McLean, Virginia in the early 1980s, where he taught Gilmore Girls actress Lauren Graham, Little Miss Sunshine screenwriter Michael Arndt, and UCLA screenwriting instructor Brian David Price.
Nelson's numerous writing credits include episodes of the television series Lois & Clark: The New Adventures of Superman, Gene Roddenberry's Earth: Final Conflict, JAG and the Disney television series' So Weird and In a Heartbeat as well as the feature film Hard Candy. He also wrote the play "Overlooked" and co-wrote the script for the vampire film 30 Days of Night, which was released in late 2007 and helmed by Hard Candy director David Slade. Nelson wrote the script for the M. Night Shyamalan-produced thriller Devil.