Paris Fashion Week: Celebrities and royals backstage, on the catwalk and in the FROW

Grace Kelly's granddaughter, Princess Alexandra of Hanover, looked pretty in pink stepping out in a frilly ensemble for the Giambattista Valli spring/summer 2018 fashion show. Photo: Getty Images

Lady Amelia Windsor looked biker chic wearing a black leather jacket over a simple dress to the Miu Miu show. Photo: Marc Piasecki/GC Images

Chrissy Teigen and John Legend made it to Paris better late than never! The model took to Instagram and joked how they arrived on the last day. Luckily, they were able to attend the Miu Miu after-party. Photo: Getty Images

Cindy Crawford was a stunner as she arrived to the Chanel show to watch daughter Kaia Gerber work the runway. Photo: Jacopo Raule/GC Images

Kaia Gerber had the honor of opening the Chanel show as her mom, who has also walked the fashion house's runway sat in the front row. Photo: Pascal Le Segretain/Getty Images

Shanina Shaik, Dev Windsor and Olivia Culpo made it ladies' night at 1 OAK owner Richie Akiva's birthday during Paris Fashion Week at L'Arc nightclub. Photo: Matteo Prandoni/BFA.com

Ruth Negga, Michelle Williams, Julianne Moore, Cate Blanchett and Alicia Vikander showed off their individual style in the front row of Louis Vuitton. Photo: Pascal Le Segretain/Getty Images

Bella Hadid showed off her impeccable street style while out and about in Paris. Photo: Marc Piasecki/GC Images

Michelle Williams had her best friend, Busy Philipps, by her side at the opening of the Louis Vuitton boutique during Paris Fashion Week. Photo: Pascal Le Segretain/Getty Images

Salma Hayek was business on top but accessorized with a pair of velvet heels for the Alexander McQueen show. Photo: Francois Durand/Getty Images

Sister, sister! Dakota and Elle Fanning made a stylish pair at the Miu Miu presentation. Photo: Pascal Le Segretain/Getty Images

Naomie Harris showed a little skin donning a black crop top and yellow skirt to the Miu Miu show. Photo: Pascal Le Segretain/Getty Images

Salma Hayek and François-Henri Pinault were front row lovers at the Giambattista Valli presentation. Photo: Dominique Charriau/WireImage

The opening of the Louis Vuitton boutique was a family affair for Will Smith, who brought his sons Trey and Jaden as his dates. Photo: Pascal Le Segretain/Getty Images

A day after hanging with Charlotte Casiraghi's ex Gad Elmaleh, Jerry and Jessica Seinfeld hung with the Monaco royal at the Stella McCartney show. Photo: Getty Images

Charlotte Casiraghi celebrated with designer Stella McCartney after her show. Photo: Getty Images

Ellie Goulding, Alexa Chung and Kylie Minogue took the front row at Stella McCartney. Photo: Getty Images

Robin Wright and Naomi Campbell both attended the Vogue party at Le Petit Palais. Photo: Getty Images

Chiara Ferragni wore a satin minidress with thigh high boots to the Vogue party in Paris. Photo: WireImage

Jane Fonda stepped off the red carpet and onto the runway in Balmain for the Le Defile L'Oreal Paris. Photo: WireImage

Helen Mirren, 72, also joined the 79-year-old on the runway for L'Oreal Paris. Photo: Getty Images

Helen Mirren dominated the L'Oreal Paris runway in a buttoned coat and wide-legged trousers with a walking stick. Photo: Getty Images

Cheryl made her runway debut in a plaid ensemble with a two-toned lip down the L'Oreal Paris runway. Photo: Getty Images

Salma Hayek and Francois-Henri Pinault had eyes only for each other as they made their way into the Balenciaga show. Photo: GC Images

Emily Ratajkowski opted for an oversized jumpsuit as she sat front row at Valentino. Photo: Getty Images

Lily Collins, Isabelle Adjani, Cate Blanchett, Rooney Mara, Julianne Moore, Pedro Almodóvar and Fan Bingbing were quite the coordinated group at Givenchy. Photo: Getty Images

Supermodel Izabel Goulart was able to enjoy the Valentino runway show from the front row. Photo: Getty Images

Marion Cotillard wore a navy and white ensemble paired with green heels to the Valentino show. Photo: Getty Images

Salma Hayek decided to have a little fun with her look by wearing a blonde wig and a bright pink suit to the Altuzarra show. Photo: WireImage

Cindy Bruna wore a flowy yellow dress down the Elie Saab runway. Photo: Getty Images

Robin Wright made her way into the Mugler show on September 30. Photo: Getty Images

Joan Smalls dominated the Mugler runway. Photo: Getty Images

The Crawford-Gerber bunch had quite an arrival to the Omega Her Time exhibit in Paris. Presley, Kaia, Cindy and Rande are all ambassadors of the brand. Photo: Getty Images

Emily Ratajkowski dined on a 3-course feast paired with four specialty cocktails from Grey Goose vodka during InStyle editor-in-chief Laura Brown's dinner at Chez Away. Photo: BFA

Cindy Bruna and Sara Sampaio got in formation during the Redemption show. Photo: Getty Images

Joan Smalls added Erickson Beamon hoop earrings to her black ensemble as she posed with a more casually dressed Doutzen Kroes and Natalia Vodianova at the 20th anniversary party for MariaCarla. Photo: Getty Images

Emily Ratajkowski showed off the menswear trend and a shorter 'do outside the Nina Ricci show. Photo: GC Images

Naomi Campbell stood next to Off/White creator Virgil Abloh at his Princess Diana-inspired runway show in Paris. Models on the runway also wore Jimmy Choo shoes that paired with his vision honoring the late British royal. Photo: Getty Images

Kaia Gerber kept one eye open as she made her way to the Off/White runway. Photo: Getty Images

Salma Hayek gave off Breakfast at Tiffany vibes in a little black dress while attending the opening party of the Yves Saint Laurent Museum with Francois-Henri Pinault. Photo: Getty Images

Charlotte Casiraghi kept her look simple in a black suit for the opening of the Yves Saint Laurent Museum opening party. Photo: Getty Images

Emily Ratajkowski, Hailey Baldwin and Karlie Kloss huddled close to the man of the hour at the Atelier Swarovski by Jason Wu in Paris. Photo: Getty Images

Spanish model-turned-actor Jon Kortajarena wore a bedazzled blazer to the L'Oreal Paris x Balmain party with Eugenia Siva. Photo: GC Images

Maria Borges, Doutzen Kroes, Balmain's Olivier Rousteing, Grace Bol, Cindy Bruna, Alexina Graham and Soo Joo Park celebrated the designer's lipstick collaboration with L'Oreal Paris. Photo: Getty Images

Georgia Fowler, Sara Sampaio and Josephine Skriver checked out the new Balmain lipstick collection with L'Oreal Paris. Photo: Getty Images

Alessandra Ambrosio and Natalia Vodianova wore the patterned-Balmain looks during the show. Photo: Getty Images

The 'Dutchess' touched down in Paris. Fergie wore a black dress with a patterned coat to the Rick Owens show. Photo: WireImage

Claudia Schiffer took a seat in the Balmain front row after walking in the Versace show in Milan. Photo: Getty Images

Hailey Baldwin opted for some extra shiny metallic pants as she hit the Parisian streets. Photo: GC Images

Gigi Hadid showed off her toned arms as she strutted her stuff down the runway for Isabel Marant. Photo: Getty Images

Rachel Weisz was pretty in blue during the Chloe presentation. Photo: Getty Images

Gigi Hadid sure was living that sweet life dripped in jewels from her Messika collaboration during a Paris Fashion Week party. Photo: Getty Images

Kourtney Kardashian returned to Paris one year after her sister Kim was robbed at gunpoint during Paris Fashion Week 2016. For her 2017 trip, Kourtney was accompanied by her boyfriend Younes Bendjima. Photo: Marc Piasecki/GC Images

Princess Caroline of Monaco's daughters Princess Alexandra of Hanover and Charlotte Casiraghi rocked leather looks at Saint Laurent. Photo: Pierre Suu/Getty Images

Rising star Kaia Gerber, 16, hit the runway for Saint Laurent. Photo: Peter White/Getty Images

Robin Wright and her son Hopper Penn had the perfect backdrop for the Saint Laurent show - the Eiffel Tower. Photo: WireImage

Frances Bean Cobain and Courtney Love sported lingerie-inspired looks at the Saint Laurent show. Photo: Dominique Charriau/WireImage

Naomi Campbell took a break from the fashion shows to attend the UEFA Champions League football match between Paris Saint-Germain and Bayern Munich with her Star co-star Lenny Kravitz. Photo: Getty Images

Kaia Gerber got to enjoy her first Paris Fashion Week with mom Cindy Crawford. Photo: GC Images

There was a royal turnout at Christian Dior. Seen here at the show, Princess Sirivannavari Nariratana of Thailand. Photo: Bertrand Rindoff Petroff/Getty Images

British royal Lady Amelia Windsor donned a sheer gown for Christian Dior. Photo: Pascal Le Segretain/Getty Images for Dior

Naomi Watts opted for ladylike lace in the FROW at Dior. Photo: Pascal Le Segretain/Getty Images for Dior

Alexa Chung's a-dior-able knit at the presentation had us ready for sweater weather. Photo: Pascal Le Segretain/Getty Images for Dior

Karlie Kloss rocked a crop top and ball skirt at the Christian Dior show. Photo: Bertrand Rindoff Petroff/Getty Images

J'adore Dior! Jasmine Sanders and Winnie Harlow also checked out the new collection. Photo: Edward Berthelot/Getty Images for Dior

CEO of Rimowa and LVMH heir Alexandre Arnault, 25, hosted a dinner with guests like Bella Hadid to celebrate the 80th Anniversary of Rimowa's iconic aluminium suitcase at Restaurant 1728 on September 26. Photo: Bertrand Rindoff Petroff/Getty Images for Rimowa

Olivia Palermo and Johannes Huebl opted for sporty chic at the Valentino #ILoveSpike Cocktail at Paris Fashion Week. Photo: Jacopo Raule/Getty Images

Emily Ratajkowski wore classic black and a chic red lip for the Jacquemus show on September 25. Photo: Marc Piasecki/Getty Images

It wouldn't be a Louis Vuitton show without one of the label's leading ladies! Alicia Vikander showed how to mix patterns at the fashion house's new boutique. Photo: Pascal Le Segretain/Getty Images