Katherine Heigl is desperate to quit her cigarette habit - because smoking has taken over her life.
The Knocked Up actress only picked up the addiction six years ago, but claims it quickly got a hold on her and now influences every decision she makes.
Heigl tells Star magazine, "I started smoking when I was 24, because I'm an idiot. I don't enjoy it so much now, because I've become such a slave to it. I hate planning my life around when I'm getting a cigarette."