Simons V Slimane: Let the battle commence

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began. 

The first round of battle begins today on the Dior catwalk as Antwerp designer Raf Simons sends out his second collection for the house, after a brilliant Couture collection for the hallowed house in June. 

The Dior camp is already gathered closely round him: graceful, elegant and preternaturally poised, his acolytes include Julianne Moore and Emma Watson. 

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began. 

Emma Watson wore Raf Simons for Dior at the London premiere of The Perks of Being a Wallflower

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began. 

Natalie Portman is bride-like in Raf Simons for Dior in LA

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began. 

Jessica Biel was one of the first to debut Raf Simons for Dior, wearing one of the defining pieces from the collection at the Hollywood premiere of Total Recall. 

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began. 

Julianne Moore blazes in sunshine yellow Raf Simons for Dior Couture at the Emmy awards last week

They are both 44 years old. Of slim, waifish build. Nervous disposition. Menswear designers. Children of the 90s who championed the fashion of the gritty streets rather than the gilded ateliers. Courtiers of quietude. Quiet revolutionaries.

Raf Simons and Hedi Slimane have the fashion world's eyes on them as they prepare to show their collections for two hallowed houses: Dior and Saint Laurent respectively.

Scroll on to see where the similarities between the two designers end and which celebrities are siding with whom for the greatest fashion face-off since fashion face-offs began.