The film is the first Mexican film produced by a subsidiary company to a major Hollywood studio.
By pure chance, the location of Adan's apartment was on the exact same spot where it was shot, a year earlier, a demo of the movie to finance the project; but back then it was just a construction site.
It was so hard to find a young actress that looked like a teenager Marina, that in the end the part was given to Marina's real life sister, Cecilia.
Alejandra Gollás, like her character Mimí, is a former child star. She starred in "Quinceañera", the soap opera that is briefly shown in the movie, and her mother in that role was Julieta Egurrola, that plays her mother in Efectos Secundarios too. Also, she was the title character in the musical Annie; hence, the singing of "Tomorrow" in the car scene with mom.
The director worked for a whole year with the lead actors, to create the characters and the story, from her notes, ideas, and their improvisations and input.