- Rosaline is based on the 2012 young adult novel When You Were Mine by Rebecca Serle, which in turn was inspired by William Shakespeare’s Romeo and Juliet.
- Filming began in Tuscany, Italy, in September 2021 and concluded in October 2021.
- First-look images were revealed on August 11, 2022. The official trailer was released on September 22, 2022, set to Icona Pop’s 2012 song “I Love It”.
- In the play of Romeo and Juliet, by William Shakespeare, Rosaline is never seen; she dumps Romeo before the start of the play.
- Kyle Allen, who plays Romeo, previously appeared in West Side Story (2021), which is a modern version of Romeo and Juliet. He played a member of the Jets – equivalent to the Montagues, Romeo’s family.
- Rosaline had its world premiere on October 6, 2022, at the El Capitan Theatre. The film was released on October 14, 2022, on Hulu in the United States, Disney+ internationally, Disney+ Hotstar in Southeast Asia, and Star+ in Latin America. Disney announced that Rosaline would stream on Disney+ in the US but limited for 5 days, which would start from February 10 to 15. It is no longer available on Disney+ in the US.