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Nicole Richie living next to Cameron Diaz

Nicole Richie living next to Cameron Diaz

Nicole Richie has moved next door to Cameron Diaz.

The 'Candidly Nicole' star and husband Joel Madden - who have seven-year-old daughter Harlow and five-year-old son Sparrow together - recently relocated into the same Beverly Hills enclave as his twin brother Benji and his 'Sex Tape' actress wife.

A source has told Us Weekly magazine the couple bought a $6.7 million four-bedroom home which "is just a few doors down from Cameron's" and moved in earlier this month.

Both couples are extremely close and the 33-year-old reality TV star previously admitted she was responsible for setting her brother-in-law up with Cameron just seven months before they tied the knot in January.

She said: "Yes. I'm going to take responsibility for everything! I approve of anything that's going to make Benji happy.

"I am a devoted sister-in-law. I'm happy for anyone who is happy, and I want everyone to be surrounded with love."

Meanwhile, Cameron has also become a devoted aunt to Sparrow and Harlow.

The source said: "She's more determined to have a baby, seeing how wonderful Nicole's family life is. She's inspired by Nicole on many levels."