Raf Simons was formally announced as the new chief creative officer of Calvin Klein on Tuesday.

The move marks a momentous change for the Belgian designer, who famously stepped down from his role as the women’s creative director for Christian Dior Couture after just three years.

Simons, who is renowned in the industry for his clean, minimalistic pieces, has been devoting himself to personal projects and championing the designs for his namesake label.

The global fashion brand made the announcement on its Instagram Tuesday morning. Simons will be overseeing the creative strategy of the brand globally across all of the company’s brands – from Calvin Klein Collection to Calvin Klein Home brands.

“Mr. Simons’ first collections will debut for the fall 2017 season,” the brand wrote on an Instagram post.

“The arrival of Raf Simons as Chief Creative Officer signifies a momentous new chapter for Calvin Klein,” said Steve Shiffman, CEO of Calvin Klein, Inc. in the Instagram post.

“Not since Mr. Klein himself was at the company has it been led by one creative visionary, and I am confident that this decision will drive the Calvin Klein brand and have a significant impact on its future. Raf’s exceptional contributions have shaped and modernized fashion as we see it today and, under his direction, Calvin Klein will further solidify its position as a leading global lifestyle brand.”

In addition, Calvin Klein announced the appointment of Pieter Mulier as creative director who will report directly to Simons. Mulier will now be responsible for executing Simons’ creative vision for the men’s, and women’s apparel and accessories lines for the Calvin Klein brand.

In preparation for Simons' debut collection for Calvin Klein for fall 2017, we are taking a look back at some of the designer's most stunning pieces from his time at Dior. Here are five of the designer’s best looks from the legendary fashion house. 

1. The graphic coats and latext/lucite heel boots from Dior's fall/winter 2015/2016 Womenswear show. 

GettyImages-465353636 A model walks the runway during the Christian Dior show as part of the Paris Fashion Week Womenswear Fall/Winter 2015/2016 on March 6, 2015 in Paris, France. Photo: Pascal Le Segretain/Getty Images

2. The '60s-inspired floral prints and luxurious shift dresses from the Chirstian Dior Haute Couture SS15 collection.

GettyImages-462275438 A model walks the runway during the Christian Dior show as part of Paris Fashion Week Haute Couture Spring/Summer 2015 on January 26, 2015 in Paris, France. Photo: Pascal Le Segretain/Getty Images

3. The layered dresses and turtlenecks from Esprit Dior Tokyo 2015 show. 

GettyImages-460309002 A model showcases a design during 'Esprit Dior', Tokyo 2015 Fashion Show at Ryogoku Kokugikan on December 11, 2014 in Tokyo, Japan. Photo: Chung Sung-Jun/Getty Images for Dior

4. Sweeping coats/vests and drawstring shorts at Dior's Womenswear SS15 collection. 

GettyImages-456135092 A model walks the runway during the Christian Dior show as part of the Paris Fashion Week Womenswear Spring/Summer 2015 on September 26, 2014 in Paris, France. Photo: Pascal Le Segretain/Getty Images

5. The classic Dior silhouette, as seen at the Christian Dior Haute Couture fall/winter 2014/2015 show.

GettyImages-451799732 A model walks the runway during the Christian Dior show as part of Paris Fashion Week - Haute Couture Fall/Winter 2014-2015 on July 7, 2014 in Paris, France. Photo: Pascal Le Segretain/Getty Images