Last night the stars were out in force for The Serpentine Summer Party in Kensington Gardens in London. The great and the good of the fashion world, from Kate Moss to Sienna Miller and Ellie Goulding were on seriously glamorous form for the night with slip dresses, sequins and plunging necklines trending.
Also in London, Kate Middleton attended The Art Fund Prize at The National History Museum, channeling the off-the-shoulder trend in a sleek jersey dress by Brazilian-born designer Barbara Casasola.
Meanwhile in Paris, Olivia Palermo, Mila Jovovich and Zoe Kravitz were front row-ready at Valentino's latest Couture show, wearing standout pieces from the forthcoming Autumn Winter 2016 collection.
Check out all of the best looks of the week in the gallery below.
Kate Moss channels boho in an exclusive chevron dress from her Kate Moss x Topshop collection at The Serpentine Summer Party in London.
Sienna Miller looks divine in a spaghetti strap Tommy Hilfiger slip dress and matching Mary Jane heels at The Serpentine Summer Party in London.
Naomi Campbell radiates glamour in an all-over-sequin midnight blue and gold gown by Tommy Hilfiger at The Serpentine Summer Party in London.
Maisie Williams plays mix and match at The Serpentine Summer Party in a black and emerald mini and accessories in the same shades.
Ellie Goulding goes Grecian with her plunging, sheer-sleeved maxi dress and soft half-up do at The Serpentine Summer Party in London.
Immy Waterhouse goes all-out 70s with her Tommy Hilfiger separates at The Serpentine Summer Party in London.
Fearne Cotton stands out for all the right reasons at The Serpentine Gallery Summer Party in London in an ornately embroidered lilac gown with contrasting waistband and hlater neckline.
Jenna Coleman looks ladylike in a white cutout dress and nude platform heels at the The Serpentine Gallery Summer Party in London.
Model Arizona Muse makes a splash in a pretty printed silk gown with plunging neckline at The Serpentine Summer Party.
Sophie Dahl wears a plunging 70s-style jumpsuit, sequin clutch and Heidi plaits at The Serpentine Gallery Summer Party in London.
Model Winnie Harlow wears paisley co-ords at The Serpentine Gallery Summer Party in London.
Lily Donaldson looks striking in a classic black column gown with velvet panel at The Serpentine Gallery Summer Party in London.
Thandie Newtonis the epitome of chic at The Serpentine Party in London wearing a silk floral maxi dress and Lulu Guiness lip clutch.
Georgia May Jagger
Georgia May Jagger wears a sparkling Tommy Hilfiger mini and statement strappy heels at The Serpentine Summer Party in London.
Erin O'Connor opts for an ethereal look in a sheer overlay lace gown at The Serpentine Summer Party in London.
Rita Ora brings drama to The Serpentine Summer Party in London in a sheer jumpsuit by Tony Ward Couture.
Anna Friel looks chic in an emerald green column dress at The Serpentine Summer Party in London.
Cressida Bonas sticks to her preppy aesthetic in a Peter Pan collar gown by Tommy Hilfiger featuring a peekaboo cutout at The Serpentine Summer Party in London.
Kate Middleton looks sleek in a ribbed, shoulder-baring white gown by Brazilian-born designer Barbara Casasola attending The Art Fund Prize at the Natural History Museum, London.
Olivia Palermo attends Valentino's Haute Couture Show in Paris wearing a fringed silver sweater dress by the fashion house matched with classic loafers and statement round sunglasses.
Mila Jovovich nails the off-the-shoulder trend in a pleated jersey dress and statement knee-high boots at the Valentino Haute Couture Show in Paris.
Zoe Kravitz adds edge to a divine nude hued Valentino gown with sheer skirt at the house's Haute Couture show in Paris.