Mark Hanna was an American screenwriter and actor. He was known for writing the screenplays for many science fiction B movies in the 1950s, particularly Attack of the 50 Foot Woman. His first major screenplay was Gunslinger in 1956. He continued to be prolific through the mid-1960s, after which his film credits become sporadic. His last screenplay was for Star Portal in 1998, five years before his death from compilations of Stroke.