Forget sibling rivalry, these sisters make stepping out in style a family affair.

1. Mary Kate and Ashley Olsen: Leading the vanguard of most fashionable siblings are the Olsen twins who, for years, have dominated fashion magazines for their individual looks.

2. Kate and Pippa Middleton: The Duchess of Cambridge and her sister are the newest fashion contenders but the English roses make up for it by being the picture of high class all the way.

3. Penelope and Monica Cruz: Both born into a very blessed gene pool, these two have designed for MNG Mango, the results of which make for smouldering style.

4. Sienna and Savannah Miller: While Sienna has been making tabloid pages as much for her style as her personal life for years now, Savannah has been designing clothes. This is truly a case of fashion running in the family.

5. Emily and Zooey Deschanel: One can't help but be charmed by these two. With Emily's taste leaning towards classics and Zooey's a bit more on the quirky side, they make quite the pair on and off camera.

6. Emily and Dakota Fanning: They may be young but these two are heavy weights in the fashion game. With blond hair and light eyes, these sisters are turning the heads of even the most jaded fashion editors.

7. Beyonce and Solange Knowles: The House of Dereon divas bring it every single time. Mama Knowles must be so proud!

8. Kate and Rooney Mara: Acting siblings have long since been a cliché in Hollywood but there's certainly nothing stale and boring about these sisters as they manage to be both classy and edgy at the same time.

9. Hilary and Haylie Duff: The Duffs certainly know their stuff. Even with a rumoured baby bump on the way, Hilary still looks fresh and Haylie looks every bit the material girl.

10. Jennifer and Linda Lopez: Bet you didn't know that the award winning journalist was actually J.Lo's sister; but when these do step out, do they go all out.

Hollywood