Waterhouse said that it was done in a "crazy attempt to tidy them up", reports femalefirst.co.uk.
"I once accidentally shaved off one of my eyebrows! It was in a crazy attempt to tidy them up when I didn't have any tweezers," Waterhouse was quoted as saying by Marie Claire magazine.
�Naturally, my brows can be quite feral, so I look a bit happier when the hairs are brushed up. I tend to use any eyebrow gel I can get my hands on," she added.
Waterhouse has also shared her hair doesn't need much maintenance so she trims her own locks and relies on cupboard ingredients as a DIY conditioner.
"I cut my own fringe and take scissors to it late at night when I can't sleep. It isn't looking too great right now, so I'm growing it out and starting again. I use hairstylist Neil Moodie's products and never blow-dry my hair," she said.
"I prefer the way it looks after washing it, then sticking my head out of the car window. A quick brush-through and I'm good to go".(IANS)