Producer Jonas Rivera told us that they determined the color and appearance of each character this way: "Yeah, that was kind of fun, because it was such an abstract process. Pete had said he wanted these characters to look like our emotions feel, which was hard for the arts department to then chase down what that would be. We didn't want them to be little people or little Muppets. So Joy was a star, and she was literally this golden, illuminated, almost like a sparkler, like an explosion. Even her body language, she's always out. And Sadness was a teardrop, so even the shape and color and her hair, sort of almost a waterfall. Fear was just a raw nerve. He drew this straight line, like he is tight and conservative, and he's − I don't know − he's wound up. Anger's a brick, this immovable briquette or something that could blow his top. He just was a square. And Disgust was a stalk of broccoli. He just drew that like our kids would be disgusted by that. And that was just this metaphoric way to attack them all, and they sort of retained that shape and color as they went on, I mean, purple really not so much, I guess."
Lewis Black (voice of “Anger”) told us that the movie he feel in love as a child is: "My mother carried me until I was 27. No, Up, had a big effect. Up just irritated me because it was like – I was old enough at that point to go “Yes, you know what I wanna do for the next couple of hours is confront death; that’s kind of a fun thing for me to think about.” Someone who’s spending his whole life avoiding thinking about it and if it’s literally like oh boy, I’m gonna die. And the big one for me was – the Disney one’s – was Fantasia because that was the one that made me go “I can’t wait to do whatever it is they’re doing.” You could laugh at that, that’s funny."
Phyllis Smith (voice of “Sadness”) told us that she was surprised to learn that sorrow was at the core of the story: "I attribute that to the genius of Pete Docter and the writers and they really – they took me on a journey too. I didn’t realize that it was going to have that kind of feeling until the end of the movie and I just love how Joy and Sadness – it shows the importance of your emotions in your life and that’s it is okay to be sad and to have – and Joy just complements it – becomes aware of that too. It’s a really nice moment. So it’s Pete Docter’s fault; it’s all his fault."
Bill Hader (voice of “Fear”) was asked to describe to kids what will make Inside Out a classic film that they must see: "It’s a quote that can change our lives. Oh gosh, we all remember where we were the day Bill Hader described Inside Out for our generation. That’s what they’re gonna say when I get the presidential medal of freedom. I’ll be like in a wheelchair “I was there when he said what Inside Out meant.” All right, What would make it a great film for children. I think it’s – what’s so great about this movie is that they chose to make a film about a time in your life that we all have to go through – when you go from being young and then you start to go – when you’re an adolescent, things start to change and things start to get a little hard for you and a lot of normal movies don’t talk about that. I wish I had that growing up because I would go through that and you look for answers and you think you’re the only one going through this thing and they did in this film in such a beautiful, fantastical way and that’s why you have to see it. It’s a movie I wish existed – my life would have been a little easier I think if this movie existed when I was a kid. How was that for an answer?"