Comfort is number one for me with shoes. I like to do a test walk in heels to make sure I won't fall or get crazy blisters.
If I'm ever wearing a super-flowy dress, I like to toughen it up with a boot or something.
There was one time during my busiest month when I went into school, and they were like, 'Sadie, where's your calculator? The PSAT is today.' I was like, 'The what?' Luckily, it was the practice one, but I still had to text my dad and get him to bring me my graphing calculator.
I think, often, child actors are, like, overlooked a little bit.
I have, like, a playlist with all my favourite songs on it. Sadie's Playlist is the soundtrack of my life. 'Wonderwall' by Oasis, 'Under The Bridge' by Red Hot Chili Peppers, TLC, 'Waterfalls' - I love the '90s.
I have not seen 'It' because I don't like horror movies. I don't mess with clowns or demons.
I don't have speed dial, but if I had one, it would probably be my mum.
I worked with a skateboarding instructor for three hours every day. We would go to the park and do ramps. I had to wear a ridiculous amount of gear - elbow pads, knee pads, every kind of pad, plus a helmet - to stop myself from getting hurt.
For the Emmys, my friend Rooney Mara designed a dress for me with her brand, Hiraeth. It's so neat to see a sketch turn into a full-on look.
I'm not really about spending every second on social media. I think there's a lot more useful things you can do with your time.
Not everybody has their first kiss in front of 200 extras and their mom.
My dad's a teacher and a football coach, and he found a job in New Jersey.
I'm not just edgy, and I'm not just into a tomboy look, and I'm not just girly. I do what I want, and if I like something, I'll wear it.
My Miu Miu gown at the Golden Globes was the first time I had anything custom-made for me.
I've always been laid back, go with the flow.
I always felt stupid at the skate park. Everyone else is just wiping out and getting hurt, but they didn't even have helmets and knee pads - and I'm over here looking like some kind of marshmallow. I felt so ridiculous.
My friend had told me about 'Stranger Things' and how I had to watch it. I was like, 'OK, I will!' I binged it in, like, a day and was like, 'Oh my gosh, Mom, you need to watch this show. Everyone needs to watch this.' A week later, I got the breakdown for Max. A month later, I got the part.
I never really had a celebrity crush when I was little. I know some of my friends have posters up on their bedroom wall; I was never really about that.
My stylist told me Chanel wanted to dress me for the 'Stranger Things' premiere. It was such a big deal for me, knowing that Chanel wanted to work with me and that I was gonna go to one of my first big red carpets wearing Chanel. That was such a huge moment for me.
I've been compared to a lot of redheads. Here's the thing though: you can look nothing like somebody, but if you both have red hair, all of a sudden people think you look exactly the same.