During the credits the chauffeur mentions to Kate they are passing Rodeo Drive, asking if she ever shopped there. This refers to Julia Roberts' role in Pretty Woman (1990), and she says, "I did once. It was a big mistake. Big. Huge." In Pretty Woman (1990), Roberts tells the shop assistants, "big mistake. Big. Huge." In the same tone.
It's been reported that Julia Roberts received a three million dollar paycheck for her role. In fact, she did receive that amount. However, her contract also said she'd receive three percent of the film's gross. The film was a huge success and she wound up with a nearly ten million dollar payday.
When we see Julia Roberts and Bradley Cooper for the first time, the Captain says "...three days of rain". The two starred together on Broadway in a play called "Three Days of Rain" in 2006. It received terrible reviews, and ran for just seventy performances.
When Edgar is at the cemetery before the movie starts, on the movie screen is the title of the movie, Hot Spell (1958), and pictures the two main characters. He mentions that the woman on the screen is his trifecta. When asked if he means literally the actress on the screen. He says "Yes, literally." The actress on the screen is Shirley MacLaine, who plays his wife in the movie.
Since Captain Kate Hazeltine (Julia Roberts) wears the patch of the 101st Airborne on both shoulders, the left shoulder signifies that she is presently serving with that unit, and the right shoulder signifies she served with that unit in combat.
Ashton Kutcher and Topher Grace starred on That '70s Show (1998) for the first seven seasons, and left either before or during the eighth season. They returned to the finale, and returned in this movie four years after the series ended.
DITRADE (Garry Marshall): As he often does in his movies, Garry Marshall cast many of his family members in small roles in this movie: Reed's co-worker Nikki, is played by Marshall's daughter Kathleen Marshall; Mr. Schwabbe is played by his son Scott Marshall; grandchildren Sam Marshall and Lily Marshall-Fricker play "Soccer Son" and Lily, respectively; wife Barbara Marshall plays the nurse who tells Julia where Harrison is eating dinner; and niece Tracy Reiner plays a French photographer. Marshall also shot a scene with his sister, Penny Marshall, in it, but it didn't make the final cut. Also hitting the cutting room floor in that scene, were Los Angeles mayor Antonio Villaraigosa, and pro-basketball player Dwight Howard.
In the film, Julia Fitzpatrick rants to Dr. Harrison Copeland about being fourteen and "having cystic acne and braces and playing the saxophone in the marching band." Jennifer Garner, who plays Julia Fitzpatrick, played the saxophone in a marching band when she was in school.
Emma Roberts was the star of a television show called Unfabulous (2004). In one episode, she talks about meeting Ashton Kutcher after she missed him at a local hangout. They appear together in this movie.
The majority of the cast have starred in a Marvel/DC comic movie; Jamie Foxx: Electro- The Amazing Spider Man 2 (2014); Anne Hathaway: Catwoman- The Dark Knight Rises (2012); Jessica Alba: Invisible Woman- Fantastic 4 (2005), Fantastic 4: Rise of Silver Surfer (2007); Jessica Biel: Abigail Whistler- Blade: Trinty (2004); Bradley Cooper: Rocket Raccoon- Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017); Eric Dane: Multiple Man- X-Men: The Last Stand (2006); Jennifer Garner: Elektra Natchios- Daredevil (2003), Elektra (2005); Topher Grace: Venom- Spider Man 3 (2007).
At LAX's baggage claim, Bradley Cooper and Julia Roberts are standing near a couple of chauffeurs who are holding signs that read "Ungar" and "Madison", a reference to Felix Unger and Oscar Madison from The Odd Couple (1970). Garry Marshall was a writer, producer, and director of the television version.
The film showing in the cemetery where Edgar and Estelle (Shirley MacLaine) reconcile is Hot Spell (1958), starring Shirley MacLaine. Shirley appears on-screen behind Edgar and Estelle as they kiss. Edgar says that Hot Spell Shirley is his "trifecta", and is his wife, Estelle.
Credits are shown near the end of the crawl for the use of three film posters from romantic comedies: Pillow Talk (1959), Love Actually (2003), and Young Doctors in Love (1982), which, not coincidently, was directed by Garry Marshall. A scene set in front of a movie theater was cut, but evidently not from the final credits.
Kathy Bates originally played Frankie in the play "Frankie and Johnny at the Clair de Lune," which was turned into the film Frankie and Johnny (1991), directed by Garry Marshall. This was filmed before Misery (1990) became a hit, and turned Bates into a well-known actress, so she was not cast in the film version. In this film, she finally works with Marshall.
In Taylor Swift's first scene, in an elevator talking to Jennifer Garner, you can clearly see the number thirteen written on her right hand. It is her favorite number, as well as she wrote it in her right hand for every show on her "Fearless" and "Speak Now" tours.
Jamie Foxx also recorded a song for the film which is called "Quit Your Job". It appears in the film, but not on the soundtrack however, because of its vulgar lyrics. "I Gotta Feeling" by The Black Eyed Peas was used for the film's trailer.
James F. McCann: The founder and CEO of 1-800-FLOWERS.COM appears as a customer in a deleted flower shop scene when Reed tries to soothe the tense customers by asking them to name their favorite love song.