Paris Haute Couture Fashion Week is in full swing, and it's set to highlight the fall-winter 2016-2017 collections of elite fashion houses. As expected, celebrities are as much a part of the show as the clothes on the catwalk.

Singer Céline Dion made her first appearance at the shows this season at Dior, where she stopped to pose by the stairs in black leather pants and a jacket that dealt boughs below the belt.

photos:evening dresses

Celine Dion attends the Christian Dior Haute Couture Fall/Winter 2016-2017 show as part of Paris Fashion Week at 30, Avenue Montaigne on July 4, 2016 in Paris, France. (Pascal Le Segretain/Getty Images for Dior)

Dion recently hired stylist Law Roach, known for dressing Zendaya and Ruby Rose. He's taken to robing the singer in Balmain, Jil Sander, Givenchy and Saint Laurent. But Monday was all about Christian Dior.

Actress Marion Cotillard attends the Christian Dior Haute Couture Fall/Winter 2016-2017 show. (Pascal Le Segretain/Getty Images for Dior)

The fashion world continues to find the Hadid sisters on trend. Though Gigi Hadid strutted for almost every major label back in March during Paris Fashion Week, her sister Bella Hadid is the early star of Paris Haute Couture Fashion Week. Today she took to Instagram to beam her cat eyes at Dior.

The clothes themselves hinted at more feline appreciation in the patterning, or perhaps it's simply a tribute to the intricate beadery and appliqué often spotted on couture Dior designs.

Schiaparelli brings circus to town

Another luxury brand on display earlier Monday was Schiaparelli. The historic fashion house took inspiration from its own Circus collection of 1938, which meant an infusion of rainbow colourways and highly detailed embroidery work.

A model dons strategically placed embroidery at Schiaparelli's Haute Couture Fall-Winter 2016-2017 collection. (Zacharie Scheurer/The Associated Press)

Socialite Olivia Palermo has moved well beyond her previous role on MTV's television show The Hills, to become a regular feature at luxe label fashion shows as well as on street style blogs.

Olivia Palermo attends the Schiaparelli Haute Couture Fall/Winter 2016-2017 show Monday in Paris. (Pascal Le Segretain/Getty Images)

Also joining the colourful Schiaparelli set is Game of Thrones actress Natalie Dormer.

British actress Natalie Dormer pauses for the media before Monday's Schiaparelli's fall-winter show. (Zacharie Scheurer/The Associated Press)

Versace on view

With a bearded Bradley Cooper in tow, Naomi Campbell flashes her legs while Jennifer Garner flashes a smile.

The actress wears an Atelier Versace silk dress from the fall 2016 collection with pale blue detailing and a high slit.

People watching people. Celebs seated in the front row of the Atelier Versace Haute Couture show included model Naomi Campbell, left, as well as actors Bradley Cooper and Jennifer Garner. (Pascal Le Segretain/Getty Images)

Designer Donatella Versace says she created this collection as an ode to female empowerment.

Oh no you Hadid-n't. Model of the moment Bella Hadid phrases an Instagram post in such a way that suggests casting her is a genius move. Well it just might be, since the star has more than 5.1M followers.

Chanel, Valentino and Giorgio Armani Prive will be among the other luxury labels presenting later this week in Paris.

Donatella Versace waves ciao as she walks the runway during the Atelier Versace show on Sunday in Paris. (Pascal Le Segretain/Getty Images)

Read more:evening dresses uk