Biographie

Trained as an opera singer at a young age due to being born with a debilitating stutter. Enrolling in opera was inspired by kindergarten teacher, within a year of opera training the speech impediment was gone. Miller had a breath-line stutter and wasn't breathing in enough to complete a word and that opera vocal training is all about control and manipulation of the breath.

Miller was a huge fan of the Harry Potter franchise long before appearing in the prequel Fantastic Beasts and Where to Find Them films.

Turned down the role of Lucien Carr in Kill Your Darlings (2013).

Was considered one of the 55 faces of the future by Nylon Magazine's Young Hollywood Issue.

Dropped out of school (The Hudson School) at the age of 16, after beginning film acting career with Afterschool (2008).

[on Il faut qu'on parle de Kevin (2011)] My agent sent me the script and I went into a sort of wrathful, thirsting pursuit. I immediately became ravenous, and I just started pursuing it like a stalker.

[on Il faut qu'on parle de Kevin (2011)] If there's one ambiguity that I feel comfortable clearing up, it's that I never for a second was thinking about how to portray someone innately evil.

I don't feel like there's any need to hide the fact that I smoke pot. It's a harmless herbal substance that increases sensory appreciation. (2012)

[discussing their sexuality in a 2012 "Out" Magazine interview] I'm queer. I have a lot of really wonderful friends who are of very different sexes and genders. I am very much in love with no one in particular. I've been trying to figure out relationships, you know? I don't know if it's responsible for kids of my age to be so aggressively pursuing monogamous binds, because I don't think we're ready for them. The romanticism within our culture dictates that that's what you're supposed to be looking for. Then [when] we find what we think is love--even if it is love--we do not yet have the tools. I do feel that it's possible to be at this age unintentionally hurtful, just by being irresponsible--which is fine. I'm super down with being irresponsible. I'm just trying to make sure my lack of responsibility no longer hurts people. That's where I'm at in the boyfriend/girlfriend/zefriend type of question.

[on their heritage and religion, in a 2012 Haaretz interview] My father is Jewish, my mother is not, but I consider myself entirely Jewish even though according to Jewish law I am not. I encourage everyone to understand that the rules [of Jewish matrilineal descent] were written before anyone could do DNA tests... I know that I am a descendant of Abraham through my father... I definitely plan to [visit Israel].