'The Devil Wears Prada' Celebrates 10 Years: 7 Little-Known Facts About the Iconic Movie

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This month marks 10 years since Meryl Streep perfected the art of shade and ran a clinic on how to slay through her portrayal of Miranda Priestly in The Devil Wears Prada, and ET is looking back at our time with the cast.

Every actor on set knew they were a part of something special while shooting the movie, but no one could have predicted how influential it would become.

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While it remains just as iconic today as it was in 2006, there are still some things about the making of the film that many fans are unaware of. Read on for seven Devil Wears Prada facts you probably didn't know.

1. Streep maintained her cold demeanor towards Anne Hathaway off screen. The veteran actress kept her distance from her co-star in order to keep things more real on screen. "She pulled me aside at the beginning of the film and said, 'Listen, I just want to say, I think you're perfect. I'm so excited that we're going to be working together, but that's the last nice thing I'm going to say to you.' And it was!" Hathaway told ET in 2006.

2. Streep almost backed out during negotiations. The three-time Oscar winner was ready to walk because of what she thought was a low offer. Producers doubled her salary on the spot.

3. Hathaway wasn't the first choice to play Andy Sachs. Rachel McAdams turned down the role, leaving the door open for Hathaway to swoop in. At the time, McAdams reportedly wanted to do more independent films.

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4. Streep was the only choice to play Miranda. The studio never had a second choice for the role.

5. The character, Emily, wasn't intended to be British. The choice to give the character a British accent was a creative move by Emily Blunt, which director David Frankel loved.

6. Stanley Tucci joined the cast just days before shooting. The Golden Globe winner signed on just 72 hours before his first day on set.

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7. Streep did not base Miranda on Anna Wintour. Despite the fact that Lauren Weisberger, the author of the 2003 book on which the movie is based, was a one-time assistant for the Vogue editor-in-chief, Streep says her performance did not take from her. In an interview with Variety, Streep said her performance was mainly influenced by directors she has worked with.

"The voice I got from Clint Eastwood," she said. "He never, ever, ever raises his voice and everyone has to lean in to listen, and he is automatically the most powerful person in the room. But he is not funny. That I stole from Mike Nichols. The way the cruelest cutting remark, if it is delivered with a tiny self-amused curlicue of irony, is the most effective instruction, the most memorable correction, because everyone laughs, even the target."