The excuse of having a dog is great, because before I had a dog, I wouldn't be like, 'I need to go hike for two hours'; my girlfriend would have been like, 'What are you doing?' Now I take the dog, and she comes with me.

When we are making a song for Billie I want it to resonate and speak the truth with her and want it to be a piece of fabric she can wear.

I just have no interest in being at a party.

If you can use songs as a tool, vehicle for empathy and a deeper understanding of how people are feeling and how people's emotions work, there's a lot of good that can come from that.

I'm a bad guitar tuner. I have to pay somebody to tune my guitars.

Even though we're all together making songs and I produce them, it's so her vision. Especially when we walk out on stage every night. It's so meticulously thought through by Billie and I admire that endlessly in her.

In the alternate reality where I wasn't involved at all, and I'd been like, just, sweating my way through, trying to have a music career for years? And then my sibling had one and I wasn't involved at all? I think I'd be very tortured by it. But the fact that we've had one in tandem makes a lot of sense.

When I started, I felt that there was this incredible amount of doubt of my ability as a producer.

Obviously I'm very grateful 'Bad Guy' is doing so well - it's shocking and surprising and gratifying - but I do think it's important to try to make the next song that people are gonna be excited about.

I stopped telling people what lyrics meant to them when I saw them tattoo it on them, because it clearly meant much more to them than it ever did to me.

The amount of times I've been told something by artists I'm working with, which I'm sure they haven't told even their significant other or families, is shocking.

I have always loved Ben Folds, he's like an idol of mine, a hero of mine.

Imagine if somebody was like, 'Who's the next Timothee Chalamet?' It's like, he's currently Timothee Chalamet.

There's always a better word than a swear word.

When I wrote 'When the Party's Over,' it had a universal quality.

I try not to shy away from specificity.

Working on TV shows was fun, but I felt crazy pressured and stressed.

I always wanted to be on tour or making albums.

I think that's probably the number one reason why collaboration is good. You disagree with each other about things and then what we always say is whichever one of us is more passionate about the issue is the winner because if you care about something enough to fight for it, that means it's probably a good thing.

I never get tired of writing about love.

All my favorite songs ever are love songs. Probably topped by 'The Luckiest' by Ben Folds.

If I'm writing with or for someone else, it just has to feel true and real for them. It has to feel like they're being honest. If it's for myself, it's the same thing. It has to be something I can mean when I say it.

I have nothing against reverb.

I think we're always looking for ways to inject a sense of humor into our music.

Love has always been the most important thing to me and the thing by which my life is guided.

It's important to recognize when a song remains important to you.

Usually, I get bored of my stuff almost immediately.

I don't really have any interest in recording at places that are institutionalized for recording.

Definitely for me and my sister, wherever we are the most comfortable is where the best music's going to be made.

We were a very crunchy, sort of hippie-dippy family.

Billie doesn't actually like recording sessions at all. We like making music together. She doesn't like going to some big studio and having them pretend to be a therapist for a couple hours. So by default, we always make the good stuff together.

Our mom cooks well, and we cook poorly. We try.

I'm not very interested in fame or notoriety at all - in fact, I'd be pretty bummed out if I woke up one day and I was, like, super, super famous. But the flipside of that is that I'm really passionate about my music, I'm really proud of it and I want it to be heard by as many people as possible, and I'm willing to embrace whatever comes with that.

As soon as you make anything that people like, you get all these new artists hitting you up like 'I want to sound just like Billie Eilish.' And I'm always like, 'Absolutely not.'

The way that we tried to approach every piece of music is, if the song had a brain, it would be aware of its catalog.

I am just fascinated by music and I want to know how to identify all the things I love about it; to me music theory is like learning another language and then being able to explain how much you love something more clearly.

I'm just obsessed with music I guess.

If you're thinking about all the possibilities of your life, there are extreme negatives, which you hope don't happen, and extreme positives, which you just aren't willing to think about because you think you'll jinx it.

I am not a very superstitious person, but I do believe in mental preparation.

To be honest, I've found so many more friends in the music industry than people I disagree with. I certainly haven't been made to feel like an outsider.

I'm not a control freak in that like I boss everybody around, but like a control freak and like, I like knowing exactly what I get to do that day and having a say.

People don't come to see a Billie Eilish show to come to see me. They come to see her. So I just try not to screw up too much on my instruments.

I've learned a lot from my mom and my dad. I learn a lot every time I watch Billie perform.

I really always wanted to be an adult. I didn't really like being an adolescent at all.

You might think of Hollywood as this full-on glamorous thing and to us it was like, 'All right, mom's got an audition. Do you want to sit in traffic for 50 minutes and go in with her?'

All the albums that I grew up listening to were produced by one person.

I felt really lucky in that I've gotten to know some of my favorite artists; I get to tell them how important they are to me. But that doesn't always make me want to work with people. I feel like if I'm going to work with somebody, it's because I feel like I actually have something to add to them.

Well, I mean there are so many producers that inspire me. I used to try to imitate production by certain people. And now I'm only interested in doing the opposite of that. I'm only interested in doing production that like no one's ever done before.

I feel like the thing that I've learned a lot is when you're involved in something, you don't always get to appreciate it for what it is as much. You're focused on the details and how you can make it better. It's kind of torture.

We wrote and recorded the 'Bond' song on a tour bus in Texas.