- Dueling Movies: With Big Fish.
- Enforced Method Acting: As told by the man himself, Travis Willingham took three real punches to the nose, because DuVall thought he was a stunt double. When he informed he wasn't, DuVall gave him some cash as an apology.
- Fake American: Michael Caine.
- Name's the Same: Jasmine the princess from Garth's tale, and Jasmine the lion. The former also shares the same name with another certain princess who interacts with Osment's character.
- Never Work with Children or Animals: Haley Joel Osment was attacked by the pig during filming. The lion had numerous trainers and handlers, but no one thought the pig might be a menace.
- Not Even Bothering with the Accent: The whole thing takes place in Texas, and Walter's mom has a pronounced Southern accent. Walter, though, doesn't even show a hint of one.
- Retroactive Recognition:
- Two of the children were played by Mitchel Musso and Jennifer Stone of Disney Channel fame. The former would eventually star alongside Haley Joel Osment's younger sister Emily in Hannah Montana.
- Viewers familiar with the world of voice acting may recognize one of the thugs in the bar fight scene as Travis Willingham, who would shoot to fame as the voice of Roy Mustang a little over year later.
- What Could Have Been:
- The original plan was to reteam Paul Newman and Robert Redford as the uncles. However, Redford's agent told the producers he "does not play old."
- Tommy Lee Jones was originally cast as Hub with Robert Duvall playing Garth, putting them together again with a built-in Casting Gag, as both actors would have essentially played the inverse of their Red Oni, Blue Oni roles in Lonesome Dove. Then he dropped out, and Duvall became Hub. Michael Caine was eventually cast in the Garth role, but Tropes Are Not Bad because Michael Caine is awesome.
- The film originally ended with an elaborate funeral sequence where pretty much every character Hub and Garth encountered in the past came back to pay their respects. This was dropped in favor of the simpler ending shown in the final cut. Word of God says, however, that the original ending is still canonical.
Trivia / Secondhand Lions