It’s Calvin Klein’s 72nd birthday.

Woah. That’s a lot of years of sophisticated catwalks and many stars donning the designer’s dresses on red carpets.

Fashion designer Calvin Klein attends the 5th annual Norman Mailer Center benefit gala
Happy Birthday Calvin (Evan Agostini/Invision/PA)

When it comes to CK it’s all about simple, single colours and minimalist design, as these celebs show in the designer’s frocks.

1. Anne Hathaway

ANNE HATHAWAY attends the Interstellar movie premiere
Anne at the premiere for Interstellar (Tina Fultz/Zuma Press/PA)

2. Jennifer Lawrence

Jennifer Lawrence arriving for the 83rd Academy Awards
Jennifer at the 2011 Oscars (Ian West/PA)

3. Lily Aldridge

Lily Aldridge arrives at the 48th annual CMA Awards at the Bridgestone Arena on Wednesday, Nov. 5, 2014,
Lily Aldridge at the CMA Awards this year (Evan Agostini/AP/PA)

4. Naomi Watts

Naomi Watts arriving at the 86th Academy Awards 2014
Naomi Watts arriving at the 86th Academy Awards 2014 (Ian West/PA)

5. Lara Stone

Lara Stone attending the 'The Search' premiere at the 67th Cannes Film Festival on May 21, 2014
Lara in Cannes (Dave Bedrosian/Geisler-Fotopress/DPA/PA)

6. Jessica Chastain

Jessica Chastain arrives at the 18th Annual Screen Actors Guild Awards
Jessica Chastain at the Screen Actors Guild Awards 2012 (Matt Sayles/AP/PA)

7. Rihanna

Rihanna attends the GQ "Men Of The Year" party
Rihanna at the GQ Man of the Year party 2012 (Brian Lindensmith/AP/PA)

8. Sarah Jessica Parker

Sarah Jessica Parker attends the 19th Annual ELLE Women In Hollywood Celebration in Los Angeles
Sarah Jessica at the Annual ELLE Women in Hollywood celebration 2012 (John Shearer/Invision/PA)

9. Scarlett Johansson

Scarlett Johansson arrives for the 47th Golden Camera awards ceremony in Berlin
Scarlett Johansson at the 47th Golden Camera awards ceremony in Berlin (Eventpress Herrmann/DPA/PA)

10. Taylor Swift

Taylor Swift attends the 2014 iHeartRadio Music Festival
Taylor at this year’s iHeart radio music festival (Kobby Dagan/ABACA USA/Empics)

11. Reese Witherspoon

Reese Witherspoon at the 2014 Golden Globes
Reese Witherspoon at the 2014 Golden Globes (David Crotty/AP/PA)

12. Rose Byrne

Rose Byrne arrives at the 65th Primetime Emmy Awards at Nokia Theatre
Rose Byrne at the Emmy Awards last year (Jordan Strauss/Invision/PA)

13. Rita Ora

Rita Ora poses for photographers backstage at the 2013 MTV Europe Music Awards
Rita at the MTV Europe Music Awards last year (Joel Ryan/AP/PA)

14. Kate Bosworth

Kate Bosworth attends the Calvin Klein 2011 fashion show in New York, Thursday, Feb. 17, 2011
Kate Bosworth in a CK dress at the Calvin Klein 2011 fashion show in NYC (Charles Sykes/AP/PA)

15. Katie Holmes

Katie Holmes attends The Metropolitan Museum of Art Costume Institute gala benefit
Katie at the MET gala last year (Evan Agostini/Invision/PA)