John McMartin (August 21, 1929 – July 6, 2016) was an American stage, film and television actor. Born in Warsaw, Indiana, he was known for his extensive Broadway career and received five Tony Award nominations. His film credits include Sweet Charity (1969), All the President's Men (1976), Brubaker (1980) and Brian De Palma's Blow Out (1981), in which he played Lawrence Henry. He also appeared in numerous television series throughout his career.