Sienna Miller donned a Matthew Williamson dress and joined her sister, Savannah Miller, to attend the 2013 BAFTA TV Awards in London yesterday. She was nominated for the leading actress award for her role in The Girl but ultimately lost out to actress Sheridan Smith, who won for her role in Mrs Biggs. Sienna has had a busy week, which started with her attending the 2013 Met Gala last Monday alongside Tom Sturridge and friends Cara Delevingne and Kristen Stewart. Sienna and Cara raised some eyebrows when the model posted a photo of herself kissing Sienna at the Met Gala on Instagram. However, Sienna insisted at the BAFTA TV Awards that the kiss was innocent. She said, "I did not snog Cara! She is like my little sister. In fact she kissed me."