Cage’s mother Joy Vogelsang passed in 2021, and the actor has previously spoken about how she struggled with mental illness for most of his childhood, at points institutionalized and undergoing shock treatments.

At the film’s Los Angeles premiere on Monday, Cage explained how for his character, “it’s the voices, it’s not really him; he’s been hijacked by something else. I’ve often thought what was it that happened to my mom — if I’m any good in this movie, it’s because of my mother. That also gave me a bit of empathy for the character, as crazy as what his situation is and what he’s getting up to with these effigies.

In Longlegs, Maika Monroe stars as a new FBI agent assigned to the unsolved serial killer case, discovering a personal connection to the murderer as she tries to stop him before more people are killed. In the trailer and marketing for the movie, Cage’s appearance is mostly kept hidden, except for the high-pitched voice belonging to his character.

Cage said that he crafted both his character’s unrecognizable look and voice alongside writer-director Osgood Perkins, with the star saying he was “calling him at 4:30 in the morning on Christmas Day two years ago giving him soundbites of me rehearsing the dialogue.”

Perkins added that for the voice, “we talked about what was the opposite of being aggressive? Was there sort of a feminine aspect that would be interesting?” Perkins said Cage would go off and “sort of does his homework and brings it to me at the front of the classroom and I sort of check it and if something looks good I say yeah, if something is a little too far I bring it back. I’m just curating it, I’m not telling him what to do.”