"Alice" believes she has the “potential” to go insane.

Helena Bonham Carter

believes she has the “potential” to go insane.

The Alice in Wonderland actress – whose mother Elena suffered a severe breakdown 38 years ago — believes mental illness is hereditary and accepts the fact she may suffer herself in the future.

“There’s a good streak in our family of, I’d say, healthy insanity,” she said. “My mother, and I know, my grandmother and great-grandmother. I think it’s very much genetic.