Mary Kate and Ashley Olsen interviews Karl Lagerfeld for their new book Influence

AO: What do you do now to stay in shape?
KL: Nothing … I have a doctor who I made a book with that sold five million copies all over the world. Every country bought one, I think, in Russia and Italy and everywhere. But I don't get it — I don't know what Japan is going to do with a European diet book … Since I started my diet, which was like eight years ago, I haven't touched what I'm not supposed to: sugar, cheese, nothing! I don't even look at it. It looks to me like plastic.

KL: [N]owadays you start to model because you're young. Now the girls are sixteen, seventeen, fifteen, and Russian. They are like from another planet
AO: They can look very bizarre!
KL: I hate all these tall women. They are all giants!
MKO: If only I were a little taller — that would make me happy!
KL: You are one meter fifty-one. You are taller than that?
AO: We're five feet and one inch.
KL: Oh, I thought my office told me that you were four-foot eight or something. Not that it matters. What you need is a face. If you have a face you don't need height or a voice. Models know this; that's why the good ones don't need to talk much.

KL: I like to work with models for a long time. Sometimes the girls change, but some girls I work with for years and years. With male models it is different. I hate working with male models.
AO: Ah, well boys come and go!
KL: And I hate doing castings and things like this. "oh no you're not right" — that's horrible to say to someone. I never do castings. Other people do them, and then I see the result of the casting. It's humiliating for the models.

KL: I don't have people I don't like around me ever.
MKO: You don't have to.
KL: …I don't work with many men. I don't want to ask the men about the fashion. Their opinion doesn't interest me.

KL: I like more classic [shapes] now. Best thing to do for skinny people to wear tight dresses. Although jeans are becoming too tight.
AO: Ah! Yes, it's becoming a problem. It's the worst.
KL: You can kill yourself in these jeans.
MKO: Ha, I'd rather stay inside with my friends than limp out in tight trousers.
KL: Maybe you'll stay inside with a baby. Do you want to get married? Children? Two perfect mums, yes?
[Mary-Kate and Ashley look at each other]
KL: Ah! Don't worry, you have time. You're young. Don't you want to get married?
MKO: I don't feel the need to get married. But Ashley wants children. I'll be a great aunt or godmother.
AO: To my child.
KL: [To Ashley] Are you planning?
AO: No. I don't even have a boyfriend. You have to plan that first, right? Figure that out first?
KL: If you get a boyfriend it doesn't mean that! Today you can have a baby first. If you want. I never liked the idea of a family at all. If it's a woman — it's more fun for a woman.

MKO: It can be dangerous when you're driving [in L.A.] particularly, because they follow you in cars and scooters. That's bad. That's not easy.
KL: I had two accidents where I fell asleep — after that I thought it was better that I don't drive. I'll get a driver. I'm a bad driver because I want to look there, there, and up there. I get bored easily — so twice I fall asleep and twice the car is destroyed … I had nothing [wrong] with me — but both cars were destroyed.