Sienna Miller in navy slip dress at Selfridges event on July 4

WHO: Sienna Miller at Rockins Selfridges Pop-up party on July 4 2017

WHAT SHE WORE: Sienna wore navy slip dress from Nili Lotan, black fringed flower scarf from Rockins and black sandals

BUY:

DRESS: NILI LOTAN CAMI GOWN ROYAL BLUE

SCARF: ROCKINS FLOWERS 'N' FLAMES CLASSIC SKINNY FRINGED SCARF