Cara was joined by sister Poppy for the launch, and the two shared a sweet sisterly moment as they played with giant gold balloons and posed for the cameras.
Click on the image below for the full gallery
Cara was joined by sister Poppy Delevingne at the launch
The 22-year-old looked stunning in black leather Mulberry trousers which she teamed with a loose cream blouse and a gold pendant necklace, while Poppy opted for an effortlessly chic shirt dress which she paired with Yves Saint Laurent ankle boots.
Georgia May Jagger also showed her style credentials in bright purple patterned trousers with a hand print, teamed with black crop top and jacket.
Other fashionistas including blogger Bip Ling and model Andreja Pejić also stepped out to show their support for the British fashion icon, with Bip opting for a blue rucksack bag from the collection.
The Mulberry Cara Collection went on sale earlier this month, featuring three styles. Although Cara chose a grey camouflage version for the evening, the bags are also available in emerald and cobalt.
The English beauty first unveiled the collection during London Fashion Week in February in a woodland-themed presentation. She shares a close history with the brand, having starred in their Autumn/Winter 2013 campaign.
"I hate that thing where celebrities just slap their name on any old thing," she said, explaining her decision to collaborate with Mulberry. "I don't ever want to do anything I don't have a connection with. Mulberry was the first bag I was ever given. Before that it was always fabric bags from India. I loved that bag and wore it to death."
Cara joins line of style icons including Alexa Chung and Lana Del Rey, who also have Mulberry bags named after them.