Kendall (the face of Calvin Klein, FYI) and the brand's creative director Francisco Costa squeezed in a little bonding time at the 2015 Tony Awards.
Balmain Creative Director Olivier Rousteing has a fun, work-meets-play relationship with sisters Kim Kardashian and Kendall Jenner, who have called themselves part of the "Balmain Army."
Lagerfeld has declared Knightley one of his favorite muses, and continually dresses the actress (and Chanel ambassador) in custom gowns for the red carpet.
The designer and actress have developed such a close relationship that he personally designed Anne's airy, pale pink wedding gown for her nuptials to Adam Shulman.
The gal pals partnered on a capsule apparel collection for Gwyneth's Goop website in 2013.
The iconic designer and director loves Julianne so much that he cast her in a starring role for his debut film, A Single Man.
These ladies are not only good friends but style soulmates too.
The designer responsible for RiRi's naked dress is also one of the songstress' closest friends.
The Givenchy honcho is a close friend and confidant to Mr. and Mrs. West.
Really, does Renee wear anyone else? The actress' longtime friendship and red carpet relationship with Herrera is one for the ages.
The Burberry CEO is a family friend to Posh and Becks, as well as a Romeo Beckham fan: The tween has starred in a series of campaign ads for the British luxury label.
The bad boy and girl of the '90s high fashion scene made haute couture fun for more than a decade.
A pair of platinum blonds in some seriously slinky dresses: The Gaga-Donatella version of two peas in a pod.
This wild duo has collaborated both on the runway and off.
The Selma actor and Marchesa designer's friendship dates back to their days as schoolmates in England.
These two are co-hosts and BFFs in one.
The British style maven and her fashion designer bestie were all kisses and smiles in London during Fashion Week.
Jacobs and Coppola are good buddies and great collaborators: She directed a commercial for his Daisy perfume campaign, and has even starred in ads for the fragrance. (Jacobs, meanwhile, has dressed the acclaimed director for the Oscars.)
What better way to seal a friendship than to design a handbag for your bestie's eponymous brand?
The actress is a constant red carpet companion of Posen.
Hugs are to be had between these British style icons-cum-BFFs.