Credit: Michael Kovac/FilmMagic

Casey Johnson was pronounced dead Monday morning in a Los Angeles area home, confirms. The heiress to the Johnson & Johnson fortune was 30 years old and recently made headlines as the apparent fiancee to reality star Tila Tequila.

"The Johnson family is mourning its tragic loss, and asks for privacy during
this very difficult time," said a rep for the Johnson family on Monday evening.

"At this point, it appears to be a natural death," LAPD spokesperson Sara Faden tells "There was no evidence of foul play. The coroner's office will now take over the investigation and conduct their toxicology screenings."

Tila Tequila (real name: Tila Nguyen), 28, also confirmed the tragic news on her Twitter:

"Everyone please pray 4 my Wifey Casey Johnson. She has passed away. Thank u for all ur love and support but I will be offline to be w family"

Johnson was mother to a three year-old girl, Ava. Johnson adopted Ava in Kazakhstan in 2007, but the little girl is now in the custody of Johnson's mother, Sale Johnson, in Manhattan.

Tila spoke to Dec. 22 about her relationship with Johnson. "She's just the most beautiful person I've ever met." The reality star said they got engaged "a couple weeks ago," and that she planned to adopt young Ava.

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Tila announced their engagement in early December, noting that they were "very happy."