The "McDowell's" restaurant was actually a Wendy's on Queens Blvd. that was scheduled to be closed for a complete renovation. Although the production had approval from McDonald's corporate headquarters, they apparently didn't pass the word down to their local outlets. On the day the "McDowell's" sign was erected, the manager of the McDonald's 1/2 mile further up the road arrived with his lawyer and proceeded to take photographs while telling the set dressing crew they were going to be sued for everything they were worth.
The name of the fictional African country the main characters are from is called "Zamunda". This name was taken from a Richard Pryor routine where he referred to a fictional African tribe of the same name.
Cuba Gooding Jr. shot a scene in which his character (Boy Getting Haircut) tells Clarence that he does not have money to pay for his haircut. Clarence responds by cutting a big chunk out of the boy's hair. But to Gooding's disappointment, the scene was deleted.
A television pilot of a weekly sitcom version of the film was produced for CBS following this film's successful release. The series starred Tommy Davidson as Prince Tariq, and Paul Bates reprised his role as Oha. The pilot went unsold, but was televised on July 4, 1989 as an episode of CBS Summer Playhouse (1987).
When King Jaffe Joffer (James Earl Jones) visits New York to bring Akeem back home, he wears a lion skin sash. Years later Jones would portray the voice of the lion king Mufasa in Disney's The Lion King (1994). Madge Sinclair (Queen Aoleon) would also star alongside Jones in The Lion King as Mufasa's wife, the lioness queen Serabi.
The £100 banknote issued by the Bank of Zamunda and featuring Prince Akeem's portrait, is derived from the Bank of England £1 Series C design, in use in England and Wales from 1960 to 1979. Akeem's portrait is in the place of Queen Elizabeth II's, and the crest of Zamunda covers the vignette of Britannia. Everything else (apart from "Bank of Zamunda" and the amount) from the intricate background, the curlicues, the diamond shape underlying "I Promise to pay the Bearer", to the position of the serial numbers, is exactly the same as the British note.
Eddie Murphy's demands for appearing in the film included $1,500 a week for his personal trainer, a round-the-clock chauffeur service, a valet and $1,000 a week for his brother to appear as his stand-in.
Louie Anderson's character, Maurice, has a little monologue at McDowell's that would later be referenced in the 2005 song "Gold Digger" from Kanye West where the lyrics say, "He got that ambition, baby, look in his eyes. This week he mopping floors, next week it's the fries."
A scene featured in this movie's theatrical trailer but was cut from the final film shows Cleo McDowell, Akeem, and Semmi walking into Cleo's office where he asks them if either of them have had any fast food work experience, to which Semmi quizzically responds "Certainly not!". Akeem then proceeds to lightly nudge Semmi and then responds to Cleo telling him that this is their first job in the United States.
The South African band that sang during the opening credits was Ladysmith Black Mambazo, the same band that sang with Paul Simon a few years earlier on the tracks "Diamonds on the Soles of her Shoes," and "Homeless," featured on his Grammy Award winning album "Graceland."
The Mercedes that the King, Queen, and their staff travel in around New York City has U.S. diplomatic plates (red, white, and blue) on them, implying that they are cars from the (ficticious) Embassy of Zamunda. However, the numbers on the plates have been slightly blurred/unfocused in post production to make the letters and digits (which can identify the type of UN/Diplomat and their country) illegible.
When Prince Akeem (Eddie Murphy) goes to sit with the King and Queen at the breakfast table, the King is surprised to find out that Akeem had grown a mustache. In Beverly Hills Cop (1984), when Axel (also played by Murphy) visits Jenny Summers at the art gallery where she works, she is just as surprised to find out that he grew a mustache.
LOGO GIMMICK: After the stars circle around the Paramount mountain and "Paramount" and "A Gulf+Western Company" appear, the sky becomes sunnier (pink to yellow) and the camera zooms in over the mountain summit. We then see a valley/terrain and the opening credits begin.
The trivia item below may give away important plot points.
John Landis: [look to camera] When Patrice tells Daryl he needs to take off his wet clothes after he tells her that Lisa dumped him, he looks directly into the camera. Also, at the Mcdowells house when Cleo's daughter Patrice says "Why does she always get the good ones?", the dog does the same thing.