Sienna Miller

A defining mid-aughts moment.

If you are famous and you live in L.A., but you weren't invited to this event...kinda awkward!

She reverted back to her boho roots momentarily for this Clare Waight Keller number.

To quote the iconic André Leon Talley, "My eyes are STARVING for beauty!"

See all the outfits that made fashion history.

A new wave of labels are mixing things up on the step-and-repeat.

You impressed us this year, Hollywood.

When Gucci sponsors a party, you know it's going to be good.

Alessandro Michele threw a Gucci-fied house party in a Roman villa.

Models! Gowns! Oh, and movies!

No one does geek chic quite like Alessandro Michele.

She looked like a breath of fresh spring air in the gross humid heat of summer.

Leave it to her to make spaghetti straps feel incredibly current.

Tiers on tiers of Gucci.

See every standout look from the evening right here.

The cast includes Sienna Miller, Lily James, and Domhnall Gleeson.

Lace or beading? No sweat.

There's much to be learned from the Serpentine Galleries' annual Summer Party.

Plus: Burberry's first "see now, buy now" campaign has arrived.

Of course they would.

A behind-the-scenes look at how celebrities get prepped for the red carpet.

If you wore Gucci on the red carpet this year, chances are you're on this list.

With the help of their stylists, some of Hollywood's favorite fashion darlings are gravitating towards these two brands.

No one else should be allowed to wear it.