John David Logan is an American playwright and filmmaker. He is known for his work as a screenwriter for such films as Ridley Scott's Gladiator (2000), Martin Scorsese's The Aviator (2004) and Hugo (2011), Tim Burton's Sweeney Todd: The Demon Barber of Fleet Street (2007) and Sam Mendes' James Bond films Skyfall (2012), and Spectre (2015). He has been nominated three times for Academy Awards, and has won a Tony Award and a Golden Globe Award.

Gladiator is a 2000 historical epic film directed by Ridley Scott and written by David Franzoni, John Logan, and William Nicholson. It stars Russell Crowe, Joaquin Phoenix, Connie Nielsen, Tomas Arana, Ralf Möller, Oliver Reed, Djimon Hounsou, Derek Jacobi, John Shrapnel, Richard Harris, and Tommy Flanagan.