The style icon opted for a tailored black suit for the party held at the trendy 34 restaurant in Grosvenor Square, which she paired with a monochrome mesh top to add a twist to her classic outfit.
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Kate Moss wowed in a tailored black suit
Kate accessorised her ensemble with some black stilettos and a sleek, dazzling bracelet, completing the look with a bright red shoulder bag for a pop of colour.
The 40-year-old model was joined by stylish friends including Rita Ora, Sadie Frost and Jade Jagger for the glitzy event.
Rita opted for bold sheer studded skirt, which she paired with an oversized cream shirt and some black stilettos. The quirky singer sported her signature red lipped beauty look, and tied her platinum blonde locks back into a high bun.
Rita Ora came out to support the supermodel
Meanwhile, Jade chose a leopard-printed dress with some black tights and shoes, while Sadie wore an all-black ensemble as she showed her support for the launch.
Close friend Naomi Campbell did not attend, despite the pair often being spotted together at events, however it was recently revealed that the two friends will appear on Channel 4's hit TV show Gogglebox together with Noel Gallagher.
It's been a busy few weeks for Kate, who was spotted on the front row of shows including Burberry and Gucci during the Spring 2015 Fashion Week season.
The British beauty also unveiled a new campaign with Stella McCartney in support of Breast Cancer Awareness month, modelling Stella's new lingerie range of which a percentage of proceeds will go towards funding a new breast screening unit at the Royal Liverpool Hospital.
"Kate is a strong feminine woman with a daughter and a husband," said Stella in a statement. "For her it was important to bring awareness to this campaign to keep families together."