She also engaged in extensive humanitarian work through the Elvis Presley Charitable Foundation.
A few of the early reactions:
ANOTHER PERSON I SHARED DEEP EMOTION WITH HAS PASSED AWAY!
THIS IS SO SAD & SHOCKING!

Lisa Marie PresleyGetty Images
So beautiful and only 54 years old; I cant actually comprehend it.
Its hard to take when someone so young and full of life passes on.
I feel so bad about Lisa Marie and I wish the best for her children and her family.

I have the image of little Lisa Marie growing up.
i hope she is at peace in her dads arms.
my heart goes out to her family.
too much grief in just a couple of years.#riplisamarie#LisaMariePresley
Heartbreaking.
Oddly I was just at Graceland yesterday and took this picture.