Gary Oldman turned down the lead role before the role was offered to Matthew McConaughey.
According to director Harmony Korine, Zac Efron's facial hair was inspired by a panini sandwich.
According to director Harmony Korine, some cinemas in Los Angeles agreed to show the movie while spreading curls of marijuana smoke.
The little girl on the 'Dolphin Tour' boat is played by writer/director Harmony Korine's daughter.
The high pitched cackle that Moondog frequently uses while laughing is modeled after the distinctive laugh director Harmony Korine used in his performance in his film Trash Humpers.