Another week has passed, and it couldn't have been a more stylish one. That's because Marion Cotillard wrapped things up with another stunning Dior design. Joined by Nina Dobrev  in a bold, printed mini and Megan Fox  who wore Oscar de la Renta , it's safe to say this may have been one of Summer's most stylish weeks.
And they weren't the only ones who dressed to impress — streamlined designs from Julianne Hough, Megan Fox, and Maggie Gyllenhaal  stole the show this week. As soon as they hit the red carpet, we knew that if these looks were any indication, we were bound for a stylish seven days. Scroll down to get this fashion party started!
— Additional reporting by Sarah Wasilak
Source: Getty / Jon Kopaloff 
Marion Cotillard in Christian Dior  at the UK premiere of Two Days, One Night.
Nina Dobrev  at the LA Let's Be Cops premiere.
Megan Fox  in Oscar de la Renta  at the New York premiere of Teenage Mutant Ninja Turtles.
Lea Michele  at the Fall 2014 Donatienne handbag collection launch.
Katie Holmes  at the Lexus Short Films Life is Amazing event.
Elisabeth Moss  at the LA premiere of The One I Love.
Julia Stiles at the opening night of Phoenix.
Annasophia Robb at the opening night of Phoenix.
Kim Kardashian  in Bec & Bridge  at the Kardashian Sun Kissed Ulta  Beauty event.
Megan Fox  in Altuzarra  at The Tonight Show Starring Jimmy Fallon.
Heidi Klum  on the America's Got Talent red carpet.
Aubrey Plaza at the LA premiere of About Alex.
Kylie Jenner at the Imagine Ball.
Julianne Hough at the Roland Mouret  for Banana Republic  collection launch event.
Ali Larter  at the season premiere of Legends.
Megan Fox  visiting SiriusXM Studios.
Maggie Gyllenhaal  at the New York premiere of Frank.
Robert Pattinson  at a London screening of The Rover.
Nina Dobrev  in Bionda Castana heels at a filming of Extra.
Taylor Schilling at the LA screening and panel of Orange Is the New Black.
Zoe Kazan at the New York What If premiere.
Elisabeth Moss  at the New York screening of The One I Love.
Helen Mirren  at the New York premiere of The Hundred-Foot Journey.
Megan Fox  at the Teenage Mutant Ninja Turtles LA premiere.
Bella Thorne at the Teenage Mutant Ninja Turtles LA premiere.
Jordana Brewster  at the Teenage Mutant Ninja Turtles LA premiere.
Chloë Moretz on the set of Despierta America.
Nicole Richie , Eric Buterbaugh, and Nevena Borissova host Ryan Korban's Luxury Redefined.
Sophia Bush at the Samsung Galaxy Artist Lounge at Lollapalooza.
Chloë Moretz signs copies of If I Stay at Barnes & Noble.
Ashley Greene  at the W Chicago Lakeshore Renovation Reveal Party.