As an aspiring indie author, one thing I've learned is that you never want to be the target of a lawsuit. French novelist Grégoire Delacourt didn't get that message. His third novel, titled "The First Thing We Look At" was released last year and the main character looks exactly like Scarlett. And the male lead? He looks exactly like Ryan Gosling.
An article on Times consults with an American lawyer about privacy laws in America, but Gregoire is being sued in France which has much stricter privacy laws.
Even if he wins, he's screwed. They say that any publicity is good publicity, but considering this is a literary novel in a language other than English, the book sales most likely won't cover the cost of counsel.
This is why you stay away from identifying living celebrities (or even recently deceased celebrities) in your novels unless you can afford the potential fallout.