Celebrate the 10th Anniversary of ‘The Devil Wears Prada’ with 10 Fun Facts You Never Knew

June 30 marks the 10th anniversary of “The Devil Wears Prada!”

In celebration of the movie's 10th birthday, we've collected 10 facts you probably never knew about this comedy favorite, courtesy of IMDb.

1. Anna Wintour, the Vogue editor who is believed to have been the inspiration for Miranda Priestly, attended an advance press screening dressed entirely in Prada.

2. Full of designer clothing and accessories, 'The Devil Wears Prada' became the most expensively costumed film in history.

2. Meryl Streep donated her extravagant wardrobe from the film to a charity auction.

2. In the photo of Andrea and her parents that appears in the movie, Anne Hathaway is pictured with her actual mother, Kate McCauley Hathaway, and actor David Marshall Grant.

2. To help acquaint herself with the role, Hathaway spent a week as an assistant at an auction house.

2. More than 100 sets of twins auditioned for the role of Miranda's daughters-, Caroline and Cassidy.

2. Lauren Weisberger, author of the book on which the film is based, has a cameo role as the twins' nanny.

2. The Elias-Clarke Publishing building was actually the McGraw-Hill Publishing offices in Midtown Manhattan.

2. Valentino Garavani was the only designer who chose to make an appearance in the movie.