She is an American radio host, former high priestess of her father's organization and founder and administrator of the First Satanic Church in San Francisco, California.

[citation needed] Karla was born to Carole Lansing and Anton LaVey in San Francisco.

In 1979, Karla was dispatched to Amsterdam to oversee the International Church of Satan headquarters[5] which acted as a liaison to its members overseas.

Being the next of kin to Anton LaVey, Karla held a press conference on November 7, 1997, to announce her father's death.

It was at this time that Blanche Barton and Karla LaVey announced that they would run the Church of Satan jointly as co-high priestesses.