Her eponymous cruelty-free fashion label is a huge success.

And Stella McCartney, 45, celebrated her latest sustainable fashion collection at the Ye Olde Mitre pub in London on Saturday.

Wearing a black pleather maxi skirt from her Autumn/Winter 2017 collection, the flame-haired designer looked gorgeous as she enjoyed the evening with friends.

Eco-friendly: Stella McCartney, 45, celebrated her latest sustainable fashion collection at the Ye Olde Mitre pub in London on Saturday

Her trendy ensemble, which consisted of a loose-fitting white T-shirt tucked into the skirt, highlighted her tiny waist.

She added height to her petite 5″4 frame with a pair of black pointed court heels, and slung her hands in her pockets as she smiled at the cameras.

She styled her auburn tresses into her signature tousled centre-parting, and sported minimal make up for the occasion.