The Hole star is co-writing the tome with author Anthony Bozza and she is mining her favourite books for ideas on style, tone and what to include.
She tells Rolling Stone, "I'm reading Just Kids again because I know Patti wrote that by herself, and My Booky Wook by Russell Brand, which I think is a great book in terms of just his voice. And then I found an old Tallulah Bankhead book, where she is very fabulous. So it's a combination of those three books."
However, there is one autobiography she is keen not to copy - Keith Richards' book, Life.
She adds, "Life was just so bloody long, I didn't even finish it."