Originally Posted by ScubatheDiverman
My sister is a Wiccan and as far as I know has always been one.
Budding religious scholar man incoming. You aren't technically Wiccan based on belief alone, it's a religion of practice. And since you can't learn the practices of Wicca except by being part of a coven, and since it's against the rules to initiate someone under the age of 18 due to the sexual aspects of it, no one can actually have always been Wiccan. You do have to actually join.
Notice: This is based on my personal research into the Wicca religion. There may be some covens out there who do initiate minors, however I do not know of them.