Katie Holmes, a style-icon in her own right, seems to be inspired by her TV series persona, Jackie O.

The actress, who plays the famously fashionable first lady in the miniseries "The Kennedys," stepped out in over-sized dark sunglasses on March 16 for a trip to Barneys New York in NYC. For a modern spin on the classic look the Holmes & Yang designer wore a green blouse -- perhaps in preparation for St. Patrick's Day? -- leather pants, and elongated cardigan.

The 32-year-old face of Ann Taylor kept her accessories simple, and wore a fun pair of gold leaf earrings from Cindy Chao.

Maybe her daughter Suri helped her pick out the layered look -- the 4-year-old already gives her mother fashion advice!

Meanwhile, we believe that the mystery brunette that stars in the "What's in the Bag?" campaign is in fact Mrs. Tom Cruise. Watch the video below and let us know what you think: