Sienna Miller: Matthew Williamson Show Before 'British Vogue' Party!

Sienna Miller strikes a pose at the Matthew Williamson show held during London Fashion Week on Sunday (September 15) in London, England.

The 31-year-old entertainer sat front row at the show to enjoy the brand new looks for the next season.

Later that evening, Sienna was spotted walking close with Matthew himself after his show – she gave him a big kiss for all of his efforts!

The two headed to the British Vogue party for LFW held at Balthazar later that evening.

FYI: Sienna is wearing a Dolce&Gabbana coat.

15+ pictures inside of Sienna Miller at the Matthew Williamson show before heading to the British Vogue Fashion Week party…