Casey Johnson, daughter of New York Jets owner Woody Johnson, died Monday in Los Angeles, a spokesman for the family announced, without mentioning the cause of her death.
"The Johnson family is mourning its tragic loss, and asks for privacy during this very difficult time," a family spokesperson said in a statement.
The Los Angeles Fire Department (LAFD) which responded along with the County Police to what they called an "ambulance death investigation" at 11:51 a.m. (1951 GMT), pronounced Casey dead at her home Monday morning.
"It appears to be a natural death," an official of the LAPD said, adding that there would be a toxicology report from the coroner's office where the body is currently lying.
Casey, 30, heiress to the Johnson & Johnson fortune to whom internet celebrity Tila Tequila claimed to be engaged, was the great-granddaughter of the founder of the pharmaceutical giant Johnson & Johnson, manufacturer of health products.
Diagnosed with diabetes at the age of 8, Casey co-wrote a book with her father and mother Sale Johnson in 1994, titled "Managing Your Child's Diabetes." She later appeared in shows like 'The Fabulous Life of...' and 'E! True Hollywood Story'.
Besides her parents, she is survived by two sisters and a daughter, Ava-Monroe, whom she adopted from Kazakhstan in 2007.
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