Who is the actress in the latest GAP commercial who looks like the woman that was married to Frank Sinatra?

I think you're referring to the "skinny jeans" commerical featuring AUDREY HEPBURN, though I can't figure out which one of his wives you think she looks like. The only wife AUDREY HEPBURN even remotely resembles is Mia Farrow as she looked at the time when she was married to Frank Sinatra, but that is the first time I've ever heard anyone confuse the two.