Sister Style 101

Sister Style 101(Source: Revolutionpix/Bauer Griffin)

Those of us with sisters – and friends close enough to consider as such – know that there's just nothing like that good vibe bond (on a good day, at least)! Spotted shopping together in LA, sisters Paris and Nicky Hilton were the picture of sisterly friendship. While each Hilton is known for her individual style, the Hilton heiresses (coincidentally) chose looks that were close enough to each other's to really see the familial resemblance, not only genetically, but sartorially.

Sister Style 101
(Source: Jemal Countess/Getty Images North America)

Another bright sisterly pair are Kate and Rooney Mara. Each actress has been extremely supportive of her sister's career to date. In fact, the shot above was taken at the premiere of Rooney's movie, House of Cards. Of course, Kate was there to cheer her on. Both sisters looked amazing in their different, yet complementary styles. Rooney rocked a jumpsuit look, while Kate went for a feminine, silver lace dress.

Sister Style 101
(Source: Larry Busacca/Getty Images North America)

Of course, we can't forget the quintessential style sisters, Mary-Kate Olsen and Ashley Olsen. Pictured here at the CFDA Fashion Awards, these twins are not only actresses, but fashion designers.