Trivia

Out of sixty-five days of shooting, forty-five were in temperatures of over one hundred degrees Fahrenheit (thirty-eight degrees Celsius).

During training, Gregory Smith, the youngest of the cast, became so good with a gun, the wranglers nicknamed him "Secret Weapon".

Colin Farrell and the other cast members had to spend six weeks at a ranch, hanging out with cowboys, and learning how to ride horses before filming began. Farrell rode a horse named Milagro, and used that horse while shooting the film.

In the credits it is mentioned the use of footage from the movie Maverick (1994). It is the short scene of the paddle wheel steamer when Jesse (Colin Farrell) and Zee (Ali Larter) are getting to Florida.

At the end of the film, Jesse and Zerelda go to Tennessee, leading the audience to believe they lived happily ever after in peace. Except the James and Younger brothers continued their robberies until the ill-fated Northfield, Minnesota robbery on September 7, 1876. There, the citizens of Northfield rose up and fought the gang as they tried to rob the town's First National Bank. Robbers Clell Miller and Bill Chadwell were killed and every other member was wounded, including Jesse. A pursuit followed. The gang decided to split up with the James brothers escaping. The others were later found in a swamp by a posse. A shootout followed and robber Charlie Pitts was killed. The Younger brothers all surrendered. They were all sentenced to life in prison for their crimes. Frank James later surrendered, was tried, and acquitted of several crimes-including the Northfield robbery. He lived the rest of his life in Oklahoma. Jesse continued his robberies by joining another gang until he was shot in the back of the head by gang-member Robert Ford in 1882. Ford was promised a reward if he captured Jesse but since he killed him, Ford was charged and pleaded guilty to first-degree-murder. He was quickly pardoned.