Sources: Johnson & Johnson Heiress Is Dead

Casey Johnson's body was found earlier today at her L.A.-area home

Casey Johnson, the colorful and headline-making heiress to the Johnson & Johnson empire, has died, sources tell E! News.

Her body was reportedly discovered today at her L.A. home.

She was just 30 years old. The cause of death is undetermined.

A neighbor tells E! that Johnson's maid came out of the home earlier today and screamed of Johnson, "She's dead!"

Johnson, who adopted her daughter Ava from Kazakhstan in 2007, announced on Dec. 9 that she and reality television star Tila Tequila were engaged to be married.

Her father is New York Jets owner Woody Johnson.

Developing...

—Reporting by Whitney English