“I just wanted to shoot portrait aspect ratio that would allow me to be very close to characters, avoid distractions to the left and right of the frame and have the audience look the characters right in the eye. I know a lot of people are saying, ‘Oh, 1:1, how pretentious,’ but for me, it seems a more humble and private format, a little more fitting to these lives we’re diving into.” - Xavier Dolan on Mommy’s aspect ratio.
I wanted to have music that made sense for the characters, emotionally speaking. It’s music that would elicit emotion without trying too hard. The music all comes from this mix-tape that’s been given by the father. Steve’s father made a mix-tape based on whatever songs they heard while driving on a road trip in California. The three of them went on this road trip before he died and he made a mix-tape with all the songs from that road trip. That’s what Die explains in that Celine Dion scene. That’s where the songs come from. It’s a way to use music that’s diagetic. It’s not me playing music on the film. It’s music playing in the film. The characters are in sole control of that soundtrack. - Xavier Dolan