Katherine Heigl sure looks like she has a great smile but it turns out the picture perfect blonde wears Invisalign clear invisible braces! "I got them because of this wonky tooth. I was like, 'OK, I can't take it.' It's awesome because every two weeks you switch to a new retainer," the Grey's Anatomy star explains in the October issue of In Style. "Pretty much the perfect way to describe Invisalign is Netflix for your teeth." Heigl also talked about finding a gown for her upcoming wedding to fiancé Josh Kelly. "My sister is getting married too, so we looked for dresses together. After about five stores I was like, 'I'm done.' Everyone says, 'You just know when you put that dress on.' My sister found the right dress just like that. So I know it can happen. But it's grueling."

The Emmy winner will have some help planning for her big day, she reveals. "I hired a planner. I want it to be fun. And I don't want to freak out or stress."

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