Sienna Miller in Sweet Shoulder-Length Wispy 2007 Blond Haircut

Sienna Miller has a cute easy evening style for her medium hair; although it looks as if it would be a bit too informal for a posh event. Nice color.

Sienna Miller Hairstyles

Blonde

London/UK

Short   Medium   Long

Straight   Wavy   Curly

Formal   Prom   Wedding