Directed by: Seth MacFarlane
Starring: Liam Neeson, Charlize Theron, Amanda Seyfried, Neil Patrick Harris, Seth MacFarlane
Factual error: The movie is set in 1882, however there is a scene where he meets Doc Brown with his DeLorean. Back to the Future Part III took place in 1885.
Factual error: When Albert escapes Clinch's gang on the train, a marking on the boxcar indicates that its roof was replaced on 10-24. 1824 was long before this type of rail car was built, and 1924 would be 42 years after the movie is set.
Deliberate mistake: While done for comedic effect, the ram's penis as we see it is not what a real one looks like, most noticeably is the missing urethral process.
Edward: Hey, dude, you really shouldn't drink and horse.
Trivia: Ewan McGregor has a cameo in this film after he turned up on set to visit Charlize Theron and Liam Neeson. Charlize Theron asked him if he wanted to do it for fun, somewhat blindsiding Seth MacFarlane, who quickly got on board, not least as McGregor already had suitable facial hair as he was filming Jane Got a Gun at the time. The whole scene was done off the cuff, and he is uncredited. He's the man at the fair who gets challenged by Seth MacFarlane to explain why he's laughing and says "I don't know. He was laughing."