There are ways of avoiding becoming tabloid fodder and therefore giving people license to pry into your private life. And there's a distinction between being an actor and being a celebrity. You may become a celebrity through acting, but you don't need to do so.
Although it's not something I'm particularly proud of, I'm willing to admit that, in addition to whiling away the long stretches of time in the air and waiting in airport lounges reading the 'New Yorker' and 'New York Times' on my Kindle, I've picked up the occasional tabloid magazine.
As great as it is, 'Vogue' won't change a designer's business. But if an unknown brand is worn by a certain person in a tabloid, it will be the biggest designer within a week.