It was a night of A-list glamour in London as celebrities far and wide gathered for the Serpentine Gallery summer party in Hyde Park.
Just some of those on the guest-list included supermodels and BFF?s Cara Delevingne and Suki Waterhouse, as well as Suki?s beau Bradley Cooper and Hollywood starlet Keira Knightley.
When it came to fashion Cara Delevingne was the picture of elegance in a full-length black number while Keira Knightley added a splash of colour with an asymmetric ensemble.
Supermodel Suki worked a daring neckline but nothing was as daring as Lily Allen?s choice of attire after she cheekily flashed her underwear.