Jennifer Aniston's hairstylist Chris McMillan will style Kim Kardashian's hair for the entire wedding weekend, a source tells Us Weekly Credit: George Pimentel/; Michael Bezjian/ (inset)

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While details of Kim Kardashian's wedding dress (or dresses) are being kept under lock-and-key, Us Weekly can confirm that the bride-to-be's hair will be styled by Chris McMillan, Jennifer Aniston's longtime hair guru (and creator of The Rachel!). 

In fact, McMillan, who is already in Paris, will style Kardashian's hair for the entire weekend, including the celebration at the Palace of Versailles on Friday and ceremony in Florence on Saturday.

McMillan, who is the celebrity hairstylist for Living Proof (Aniston is a co-owner), has an esteemed roster of celeb clients including Reese Witherspoon, Sarah Jessica Parker and Miley Cyrus. And he's worked with Kardashian, 33, before: In 2012, the two played with clip-on bangs for a photo shoot. And in 2013, McMillan styled Kardashian's growing-out bangs at the MTV Movie Awards.