The 20-year-old admits she has tried cannabis but will never experiment further because of the way her jailed dad acted when he took hard drugs.
Lohan is convinced developing an early drug habit would have destroyed her fledgling career, and she is thankful to be reveling in the more challenging roles she is being offered.
She says, "I've seen my father. I've seen how it messes with families and f**ks your life up. If I hadn't witnessed that, I may have gone a different route. But I've seen how it tore my parents apart.
"I feel I have a lot of talent, but I'm only now getting to do the kinds of projects where I can push myself and show what I can do.
"I'm pretty ambitious and I want to have a very interesting career."
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