Todd Strauss-Schulson watched over 90 romantic comedies over two weeks and noted the similar visual and narrative tropes among them, including: New York City, Starbucks coffee, rain falling when couples kiss, half-moon windows, and bubble baths.

Due to how often Rebel Wilson and Adam DeVine have acted as love interests, Rebel has joked that they are "essentially the Emma Stone and Ryan Gosling now... we just play love interests in all movies." Additionally, Adam has stated that Rebel is his "work wife."

Rebel Wilson's first film as the lead role.

Rebel just asked Adam if he wanted to play one of her love interests. "The movie script was super funny, so as soon as I read it and I knew Rebel was attached, I was like, yeah, sign me up."

The red off-the-shoulder dress that Rebel Wilson wears on her yacht dinner date with Liam Hemsworth is the same dress design worn by Julia Roberts when she attended the Opera in Pretty Woman.

During test screenings, Rebel Wilson would wear a wig and sunglasses and sneak into the back to hear feedback from the audience.

One of the few films that Liam Hemsworth has used a comedic version of his Australian accent in. Normally, he puts on an American accent in films. Conversely, Rebel Wilson is also Australian, but her accent is such a trademark of hers, that she rarely acts without it.

Rehearsing the musical numbers, according to Rebel, came very easy to her and Adam. In their previous film, Pitch Perfect, they were required to attend a boot camp in which the music and choreography was taught to them prior to filming. That experience prepared them for learning two musical numbers in a short period.

Rebel was initially quite resistent towards performing "I Wanna Dance With Somebody" by Whitney Houston, due to how overplayed it is in rom-coms. However, when she heard the first music composition of it, and the unique take on it, she was won over.

The cast all agree that their favourite day was filming the karaoke scene.

This is the first time Liam Hemsworth has been in a musical number. Rebel, Adam and Priyanka, meanwhile, have had numerous experiences on film. The cast and crew teased Liam throughout shooting because of how basic his dancing was compared to the rest of the cast.

Director Todd Strauss-Schulson was strongly critical of the idea of a person becoming complete when they find a partner, as is often portrayed in romantic comedies. "You are already complete, and always have been."

Rebel has expressed her delight in having two love interests in the film, joking "when you're the producer, you get to choose that."

During the scene outside the police precinct, the building used for exterior shots of the "Friends" apartment building is visible in the background.

As producer, Rebel was very passionate about the film, and felt very strongly about conveying the message that you do not need a relationship to feel happiness in your life. "I wish somebody had told me a lot earlier in my life."

The dress and hat that Rebel Wilson is wearing when she leaves the hospital after her mugging is the same ensemble worn by Julia Roberts in Pretty Woman after she's shopped on Rodeo Drive.

Rebel Wilson and Adam Devine have previously played love interests in Workaholics (2011), Auksta klase (2012), and Auksta klase 2 (2015).

The first film that Rebel has produced. As a result, she helped with the casting process, and stated that she always envisioned Liam, Adam and Priyanka for the roles.

The movie parodies tropes found in romantic comedies. All four leads have acted in rom-coms prior that have emulated these tropes that the movie makes fun of.

Due to using the song "Express Yourself", Madonna had to approve of the cast's singing prior to shooting.

Described as "a romantic comedy about falling in love with yourself," by Todd Strauss-Schulson.

Adam Devine and Priyanka Chopra play love interests. Their partners in real life- Chloe Bridges and Nick Jonas- played love interests in Camp Rock 2 (2010).

The cast only rehearsed for four hours before filming the "Express Yourself" number.

The first American rom-com for Priyanka; she has previously completed a lot for Bollywood.

Because filming took place in parks and streets, paparazzi and fans were constantly around. In particular scenes, there would be people taking photos a few feet away from the actors, just out-of-shot.

Some of the romantic comedies alluded to include Pretty Woman, When Harry Met Sally, The Fault in Our Stars, and 13 Going on 30.

For the dog-walker scene, Todd Strauss-Schulson listed the dog breeds found in numerous rom-coms and ensured that all those breeds were a part of that scene.

Features over 120 allusions to romantic comedies, from the costumes, to themes, to dialogue.

In the past, Rebel was very cynical of rom-coms, much like her character Natalie. Through compiling research for the film, however, which required watching numerous rom-coms, she grew to love them.

The second meta film that Todd Strauss-Schulson has directed. He firstly directed The Final Girls (2015), about a group of friends that get transported into a horror movie, which also starred Adam DeVine.

Adam Devine has previously worked with Rebel Wilson on Workaholics (2011), Auksta klase (2012) and Auksta klase 2 (2015), Liam Hemsworth in Workaholics (2011) and director Todd Strauss-Schulson in The Final Girls (2015).

Prior to filming both musical numbers, a group of choreographers would act out the dances, as Todd filmed on his phone. He would then show the actors the footage to give them an understanding of what he was looking for.

During filming, Priyanka was dating Nick Jonas, who has a connection to Liam and Adam's girlfriends. Liam's partner Miley Cyrus had famously dated Nick; whilst Adam's girlfriend Chloe Bridges had played Nick's love interest in Camp Rock 2 (2010).

The "normal" world consists of very grey tones and minimal score to contrast the hyper realism found amongst the "rom-com" world.

The fourth musical-comedy in which Rebel is one of the main characters, after the Pitch Perfect trilogy.

The characters Natalie and Josh are best friends. In real life, their actors Rebel Wilson and Adam Devine are also close friends.

This is the third musical-comedy film that Rebel and Adam have starred in together, after the first two Pitch Perfect films. In all three films, they play love interests and sing together.

Todd Strauss-Schulson stated that the idea of the film derived from analysing the way love stories are portrayed in the media. "Are they helpful or hurtful? Does it lead to more isolation? This idea that you aren't whole until someone comes to save you."

Liam Hemsworth and Rebel Wilson are both Australian.

Composer Jon Brion was originally hired to score the film.

On the last day of shooting, Rebel and Liam played a prank on their director Todd. When he was preparing the scene at the ice-cream store, the two of them went to a theatre next door.

When Natalie and Blake are standing outside her apartment after he drops her off, the two green and white street guidance signs behind Blake feature a "traffic figure" stylized wedding couple (top) and a similarly stylized wedding ring (bottom).

Priyanka Chopra and Adam Devine have both starred in movies with Zac Efron. Chopra in Gelbetojai (2017) and Devine in Maikas ir Deivas ieško pamergiu (2016).

The image in the message that Natalie receives from Whitney below the "Be Open" text is a popular internet meme featuring Lindsay Ellis. The image features Ellis' Nostalgia Chick persona being inundated with sausages to the face. The original source of the meme is The Nostalgia Chick: Freddy Got Fingered w/ Oancitizen (2012).

Due to the overwhelmingly positive feedback the film received of its musical number from test audiences, the director decided to create an elaborate song-and-dance number featuring the main cast for the film's ending.

Initially, Natalie was going to ask Josh out, only for him to reject her. However, it received poor feedback from test audiences. After a long discussion with the producers, Rebel compromised and agreed to have Natalie and Josh together, but that the main message is that Natalie completes herself.