Stella's (surely very stylish, as well as very full) mantelpiece got another big boost as she took home the two top accolades, Designer Brand and Designer of the Year, the latter of which was presented by A-list star Salma Hayek.
The British Fashion Council said both awards "recognise a momentous year for the designer, through her achievements in the fashion industry and her contribution to Team GB in 2012".
The Duchess of Cambridge, Emily Blunt and Michelle Obama-favourite, Roksanda Ilincic, was honoured with the Red Carpet Award (won by Stella last year), while Cara Delevingne was crowned Model of the Year, and Alexa Chung picked up the British Style Award - beating the likes of Kate Moss and Victoria Beckham - for the third year running.
Erdem collected the New Establishment award, while shoe maestro Nicholas Kirkwood won Accessory Designer of the Year.
This year's Outstanding Achievement award went to Carrie Bradshaw-endorsed shoe king, Manolo Blahnik, who has nabbed Accessory Designer of the Year three times before, while Central St. Martins' Louise Wilson OBE won the Isabella Blow Award for Fashion Creator.
See the full list of winners here:
Designer of the Year: Stella McCartney
Designer Brand: Stella McCartney
New Establishment: Erdem
Menswear Designer: Kim Jones for Louis Vuitton
Emerging Talent Award, Ready-To-Wear: JW Anderson
Emerging Talent Award, Accessories: Sophie Hulme
Emerging Talent Award, Menswear: Jonathan Saunders
Accessory Designer: Nicholas Kirkwood
Red Carpet Award: Roksanda Ilincic
Model of the Year: Cara Delevingne
Outstanding Achievement in Fashion: Manolo Blahnik CBE
Special Recognition: Harold Tillman CBE
Isabella Blow Award for Fashion Creator: Louise Wilson OBE
British Style brought to you by Vodafone: Alexa Chung
More from the red carpet here: