I'll run through things over and over and over again in my head and think, "How could I have done that better?" Silly things like that.

Sometimes acting, particularly in film, can feel so contained. You need to be small and not overplay things, so it's such a relief to be able to go as far as you can go with an emotion or a feeling or a speech.

I saw an episode - the second episode [of Black Mirror], "Fifteen Million Merits" - and I completely flipped out: "This is what my nightmares are made of. This is the most terrifying thing I've ever seen."

It's really about connecting to your own humanity and your own behaviors, and getting to a level of self-awareness so that you can have perspective and step outside of yourself and transform and become another person.

I actually gained 30 pounds [for the episode], and I haven't lost all of it yet so I haven't been like "I gained 30 pounds!" Because I don't know if people can tell the difference.

You go on Instagram, and it's just not a real reflection of what people do, and how much pain people are in every day. So that's my mental change.

When folks get to the best of their profession, people are like, "Who am I to give a critique to this individual who's reached mastery?".