Real Housewives of Auckland's Angela Stone has been reunited with her long-lost brother.

Real Housewives of Auckland's Angela Stone has been reunited with her twin brother, who disappeared nine years ago.

In a letter published in this week's Woman's Day, Stone, 44, said her brother Carl had made contact with her and their father.

It was an emotional reunion for Stone, who has seen her twin only once since he disappeared in 2007.

Stylist and fashion designer Angela Stone

"I couldn't stop crying as we spoke... It was a moment I'll truly treasure forever," she said. Carl told her he missed her and would come home soon.

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Stone spoke about her brother's disappearance in October, when she told Woman's Day he had been so deeply affected by the death of their mother in 2003 that he disappeared.

She knew he was alive during his time away because he sporadically called a family member, but she had come to accept that he might not want to be found.

Stone said she had been close to her brother prior to his disappearance, and when he left it was like losing him as well as her mother.

"We were each other's world and now he's gone. It's like mourning a mother and a brother, only I know he is alive and I hope to God that one day he finds his way home."

She said Carl had been prompted to call her after seeing original Woman's Day story.

When approached for comment on Saturday, Stone said she was unable to talk because she'd signed a contract about the story.

Stone is a stylist, model and mother of three as well as an ambassador for the Mental Health Foundation.