A woman pretending to be actress Sienna Miller was turned away from an exclusive New York City bar because the owner had never heard of the CASANOVA actress. The Miller impersonator her so-called publicist were clearly expecting VIP treatment, but were disappointed when owner DICK MANITOBA refused to lavish them with VIP treatment. Manitoba tells PageSix.com, "(I told the woman), 'You're Sienna Miller, good for you.' Then someone who knew who she was came in and told me, 'That wasn't even Sienna Miller.'" Miller isn't the only celebrity with a conning impersonator. A woman recently pretended to be socialite Paris Hilton, while a Jessica Simpson wannabe bagged cosmetics while pretending to work for the superstar.