Mariah Carey's 2 Siblings: All About Her Late Sister Alison and Brother Morgan

Mariah Carey's sister Alison died on the same day as their mother Patricia

Mariah Carey had a complicated relationship with her siblings before her sister Alison's death in August 2024.

The "Obsessed" singer was the youngest of three children born to Patricia and Alfred Carey. The former couple first welcomed Mariah's brother Morgan in 1960 and sister Alison in 1963 before having Mariah on March 27, 1969.

Mariah wrote about her up-and-down relationship with her siblings in her 2020 memoir The Meaning of Mariah Carey, alleging that her sister struggled with drug addiction and that her brother had gotten into physical fights with their parents.

Related: All About Mariah Carey's Parents, Alfred Roy Carey and Patricia Carey

On Aug. 26, Mariah shared in a statement with PEOPLE that her mother and sister had died on the same day.

"My heart is broken that I’ve lost my mother this past weekend. Sadly, in a tragic turn of events, my sister lost her life on the same day," the Grammy-winning singer said.

From their difficult relationship growing up to how Mariah is mourning her sister's death, here's everything to know about Mariah Carey's siblings.

They were raised in Long Island, New York

Mariah was born in 1969, nine years after Morgan and six years after Alison, in Long Island, N.Y. The siblings' parents split when Mariah was 3 years old, and she went on to live primarily with her mother, who was Irish-American, while her father was Afro-Venezuelan.

After publishing her memoir in 2020, Mariah joined Oprah Winfrey on The Oprah Conversation, where she opened up more about her traumatic childhood and how she felt isolated from her siblings growing up.

"We don't even really know each other ... we didn't grow up together, but we did. Like, they were on their journeys, by the time I got into the world, they had already been damaged, in my opinion," she said. "But again, I wasn't there. I was dropped into this world and I literally felt like an outsider amongst my own family."

Mariah added that she believed her siblings viewed her life as "easier" because they grew up living with a White mother and Black father, while she mainly grew up with her mother.

Mariah alleged that her sister struggled with drug addiction

In her book, Mariah reflected on her turbulent relationship with Alison, writing that her sister was “deeply wounded” but also “the most brilliant and broken person I have ever known.”

She described how Alison witnessed "things a child should never see" before Mariah was born and that affected her deeply.

“I do know that what she experienced damaged and derailed her girlhood,” the award-winning singer wrote. “She was fully aware when the family unit unraveled and our parents turned on each other; she absorbed the full pain of a family coming undone.”

Mariah also alleged that Alison struggled with drug abuse, and pushed drugs on her when she was a child.

“My sister drugged me with Valium, offered me a pinky nail full of cocaine, inflicted me with third-degree burns, and tried to sell me out to a pimp,” she wrote in the book.

Alison, who was a mother to three sons and one daughter, denied the allegations and, shortly after the publication of the book, sued Mariah in February 2021 for $1.25 million, alleging the singer intentionally inflicted "emotional distress" on her by sharing stories that purposely "humiliated" her.

"Already struggling with the unspeakable trauma of her childhood and having her own children abandon her, she has become severely depressed and uncharacteristically tearful since the publication of defendant's book and now struggles, after a long time clean, with alcohol abuse," the document read.

Mariah claimed that her brother got into fights with her parents when they were growing up

In her memoir, Mariah also detailed her brother's relationship with Patricia and Alfred, writing that he could occasionally get violent.

She detailed one incident in which Morgan allegedly pushed their mother so hard into the wall that she passed out on the floor.

“Suddenly there was a loud, sharp noise, like an actual gunshot," Mariah wrote. "My brother had pushed my mother with such force that her body slammed into the wall, making a loud cracking sound."

She also wrote about an incident in which Morgan and Alfred allegedly got into a fight so severe that it took a dozen police officers to end it.

Morgan sued Mariah for defamation after her memoir was published

A month after Alison filed a lawsuit against Mariah, Morgan did the same, suing his youngest sister for defamation in March 2021. He alleged that Mariah's book cost him work opportunities and that she falsely characterized his behavior. The lawsuit is still pending.

"Her attempt to falsely characterize plaintiff as equally violent as their father, and her subsequent commentary on police relations with Black people was only the beginning of defendant Mariah Carey's desperate attempt to vilify plaintiff, play the victim card and curry favor with the Black Lives Matter movement," the complaint read, per USA Today.

Three months later, Mariah responded to Morgan's lawsuit in a new filing, saying she meant to "inspire" people with her brother's story rather than defame him.

"The story of Ms. Carey's rise from a dysfunctional and sometimes violent family environment has significant public value, particularly to any young person who may find her/himself stuck in similarly harsh and dispiriting circumstances and who can benefit from the inspiration to employ their talents in pursuit of their dreams," the filing read, according to Page Six.

In July 2021, Morgan filed an affidavit in the Manhattan Supreme Court claiming that Mariah's assertion that she meant to "inspire" others was "particularly ironic" due to the content of her song lyrics and fame.

He added that if she were truly trying to inspire, she should have included his overcoming struggles with cerebral palsy, grand mal epilepsy and a two-inch leg disparity when he was a child.

"This detail is conspicuously absent, which makes it clear that 'inspiration' was not on the agenda," he wrote. "Mariah's agenda merely focused on book sales and her image, all at my expense with no regard to the truth or my well-being during this world crisis."

Morgan lives in Italy with his wife

Per his 2021 lawsuit, Morgan and his wife Ilaria moved to Italy in 2012 where they've worked on two screenplays. At the time of the lawsuit, he was also writing "a permaculture-based fitness and lifestyle book."

However, he alleged that Mariah's "libelous vitriol" was damaging to his and his wife's careers as "enthusiastic negotiations" about their screenplay were "abruptly and without explanation terminated congruently with Mariah's malicious global assault on my character and reputation."

"The public humiliation of Mariah's baseless and false attacks will forever color my professional and personal interactions," he said.

Alison died on the same day as their mother

Mariah announced that her mother, with whom she also had complicated relations, and Alison had died on the same day on Aug. 24.

"I feel blessed that I was able to spend the last week with my mom before she passed," the singer said in a statement to PEOPLE. "I appreciate everyone’s love and support and respect for my privacy during this impossible time."

The following day, Alison's close friend and advocate, David Baker, told PEOPLE that she died in her own home in Coxsackie, New York, after going into hospice on Aug. 3.

“We saw it coming, but it’s still a shock,” he said. “She got ill fairly quickly and a month later, she’s gone."

Baker added that Alison's children had visited two or three weeks before her death, including her daughter, who lived nearby and visited daily. Alison told Baker that she couldn't remember when exactly was the last time she'd seen Mariah, but she knew it was either in 2002 or 1994.

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