Stella McCartney took home two top prizes at British Fashion Awards. The London-based designer was named Designer of the Year and Designer Brand 2012 at the awards.

Stella McCartney has had one hell of a 2012: first her time in the spotlight this summer as designer of the Olympic and Paralympic uniforms and Team GB kit, then a series of successful runway collections shown in Paris, and the announcement this fall that the brand has seen substantial growth from 2011 to 2012 -- sales were up 19 percent to £21 million ($34 million).

The year will have ended on a high, as McCartney was announced as the winner of two major gongs at the 2012 British Fashion Awards. Stella picked up Designer of the Year and then took to the stage again to accept the Designer Brand 2012 on behalf of her namesake label.

Hosted by Gemma Arterton and Nick Grimshaw, the awards welcomed stars from around the world including Amber Valletta, Valentino, Manolo Blahnik, the UK Prime Minister's wife Samantha Cameron, Alexander McQueen creative director Sarah Burton, Christopher Kane and Alexa Chung.

Young catwalk star Cara Delevingne took home the prize as Model of the Year, beating off competition from Jourdan Dunn and D&G man David Gandy. The 20-year-old Delevingne burst onto the scene this fall, walking in shows by Burberry, Chanel, Dolce & Gabbana, Fendi, and Stella McCartney.

Click more to check out what the stylish stars wore on the redcarpet!

Full list of winners:

Designer of the Year- Stella McCartney
Designer Brand - Stella McCartney
Special Recognition - Harold Tillman
Outstanding Achievement in Fashion - Manolo Blahnik
Isabella Blow Award for Fashion Creator - Professor Louise Wilson
Accessory Designer - Nicholas Kirkwood
New Establishment - Erdem
Menswear Designer - Kim Jones
Emerging Talent Award - RTW - J.W.Anderson
Emerging Talent Menswear - Jonathan Saunders
Emerging Talent Award Accessories - Sophie Hulme
Model - Cara Delevigne
Red Carpet Award - Roksanda Ilincic
British Style Award - Alexa Chung