Mar 16, 2008, 7:35 GMT
Kimberly Stewart is "selfish" and "materialistic", says her sister Ruby.
Kimberly Stewart - © Lee Roth / RothStock / PR Photos
Kimberly and Ruby, who live together in a house on their rocker father Rod's estate, are complete opposites and often have bitter rows.
Ruby said: "We really don't get along as housemates - she can be selfish, very hyper, and I'm the total opposite. There are arguments about dirty dishes, and she hates my dogs because she thinks they pee everywhere.
"She's more materialistic and I'm more grounded. I don't really hang out with celebrities. I have a close-knit group of friends, and I'd rather sit at home with them than be out clubbing. Kimberly loves fashion and diamonds and stuff, and she's obsessed with organisation."
Kimberly, 28, also admits she regularly argues with her younger sister - but insists 20-year-old Ruby starts most of the fights.
She said: "She's very funny, very generous, very caring.
"But her personality switches all the time. She can be really happy, then all of a sudden she'll get mad at you about something. It's so random. I've learnt not to fight back. I just let her get on with it."
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