Socialite Casey Johnson attends a party at Elevate lounge on...

Socialite Casey Johnson attends a party at Elevate lounge on June 26, 2008 in Los Angeles. An heiress to the Johnson & Johnson drug company fortunes, she was found dead in her Los Angeles home Jan. 4. She was 30. Credit: Getty Images, 2008

Casey Johnson, the daughter of New York Jets owner Woody Johnson, died on Monday, according to a spokesperson for the family.

Spokesman Jesse Derris said that the family is mourning the tragic loss of Casey Johnson. In a statement, the family asked for privacy "during this very difficult time."

Derris would not say how she died or when. TMZ reported that the 30-year-old Johnson was found dead Monday in Los Angeles.

Casey Johnson had gained celebrity of her own as the girlfriend of television personality Tila Tequila.

Tequila's publicist says the two were engaged to be married.

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