The St. Valentine's Day Massacre is a 1967 American gangster film based on the 1929 mass murder of seven members of the Northside Gang on orders from Al Capone. The picture was directed by Roger Corman, written by Howard Browne, and starring Jason Robards as Capone, Ralph Meeker as Moran, George Segal as Peter Gusenberg, and David Canary as Frank Gusenberg.

The Saint Valentine's Day Massacre was the murder of seven members and associates of Chicago's North Side Gang on Saint Valentine's Day 1929. The men were gathered at a Lincoln Park, Chicago garage on the morning of February 14, 1929. They were lined up against a wall and shot by four unknown assailants, two of whom were disguised as police officers.