Cate Blanchett says her marriage of 11 years could be over if she goes under the knife.

The actress — who currently stars in The Curious Case of Benjamin Button with Brad Pitt — tells Vanity Fair: “I haven’t done anything, but who knows. Andrew [Upton] said he’d divorce me if I did anything.”

But that doesn’t mean she’d never mess with her famous face.

“I’m not a spokesperson against the world of injectables,” The 39-year-old actress says. “If you grow up in an environment where your mother gets you a boob job when you turn 18, what hope is there? But I didn’t grow up in that world.

“The reason I went to train as an actor was that I was interested in it for the long haul,” she adds. “You can become very self-obsessed, but you’ve got to keep looking outward.”

Blanchett says her body isn’t the same after the birth of their three sons: Dashiell, 7; Roman, 3 and Ignatius, 7 months.

“When you’ve had children, your body changes; there’s history to it. I like the evolution of that history; I’m fortunate to be with somebody who likes the evolution of that history.”

“I think it’s important to not eradicate it. I look at someone’s face and I see the work before I see the person….” she adds.

Plus, Blanchett says plastic surgery doesn’t stave “off the inventible” aging process.

“If you’re doing it out of fear, that fear’s still going to be seen through your eyes,” she says. “The windows to your soul, they say.”

Upton, a playwright, doesn’t mind his wife’s looks, Blanchett says, although he doesn’t focus on them.

“I’m not a trophy. He likes the vessel, but he also wants to make sure the vessel is full.”

Blanchett says she wouldn’t rule out having more children either.

“Who knows? Don’t close those doors. The world is very overpopulated, but we do make nice ones,” she says. “They all look like Andrew. To say he has dominant genes would be an understatement.”

In addition to expanding her brood, Blanchett also has a retirement plan.

“I think I just want to garden — or kill some plants, in my case,” she says.

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