LONDON, ENGLAND - JULY 29: Sienna Miller and James Franco attend the global reveal of the BMW i3, the luxury car brand's first electric car, at The Old Billingsgate on July 29, 2013 in London, England. (Photo by David M. Benett/Getty Images for BMW)
LONDON, ENGLAND - JULY 29: Sienna Miller and James Franco attend the global reveal of the BMW i3, the luxury car brand's first electric car, at The Old Billingsgate on July 29, 2013 in London, England. (Photo by David M. Benett/Getty Images for BMW)