"America's Next Top Model" has traded Twiggy for a younger model ... literally.

International supermodel Paulina Porizkova has joined the CW's hit reality model competition show as one of the judges on the panel, replacing British model Twiggy, it was announced Monday. She'll begin her critiquing duties for the 10th cycle of the show.

"We are thrilled to have Paulina as a part of this cycle's judging panel. The show and participants will benefit a great deal from her vast modeling knowledge and expertise," said Ken Mok, the show's executive producer. "We would like to thank Twiggy for her great contributions to the show. Having an icon like Twiggy lend us her considerable expertise has elevated our show to a whole new level. We wish her well in her endeavors and hope to collaborate with her in future cycles of ANTM as well as other projects."

Twiggy is exiting the show due to scheduling conflicts. She's been a guest judge since Cycle 5 when she stepped in for Janice Dickinson. The other judges include Tyra Banks, Nigel Barker and Miss J. Alexander.

Porizkova, 42, has graced the covers of hundreds of magazines worldwide including, the Sports Illustrated swimsuit issue, Life, Playboy, Vogue, ELLE, Cosmopolitan and Glamour. She's also been named one of the 50 most beautiful people by People magazine twice.

Besides modeling, Porzikova has tried her hand at acting on the big screen in "Her Alibi," "Arizona Dreams," "People I Know" and "Knots." Recently, she also had the ignominy of being the first celebrity dancer to be voted off of "Dancing With the Stars" in its fourth season.