The former 'Hannah Montana' star plays Moore's daughter in the film and said she helped her to know about herself better, reported Contactmusic. "Without her I would not be who I am sitting here.
I would not know a lot about myself. I want to thank her for taking that first step and having the initiative to say 'Let's get this together.' I owe her a lot," Cyrus said.
The movie is about teenage romance in an age of texting and was supposed to be Cyrus's big break into more mature roles. The English-language adaptation of the popular 2008 French film with the same name will premiere in just seven cities in the United States on May 4.