Rights for Use of a Song in a Film

Hello, I'm reaching out because I'm currently in the process of producing a feature film that would require the usage of a song featured in a musical your company owns. The rights to use the musical isn't needed, just the song. Characters in the movie will be performing it. I would like to know the process of how to go about obtaining these rights. If there is someone I can speak to regarding the song and the specifics on the feature film, that would be most helpful. Thank you so much! Matt Steele MattSteele4444@gmail.com