1. Kristen Stewart Click for more photos

The world's best-dressed women

1. Kristen Stewart

Twilight actress Kristen Stewart has been crowned the world's best-dressed woman, beating the Duchess of Cambridge and Victoria Beckham in a UK magazine's annual poll.

Kate, in fourth place, is a newcomer on the coveted annual list, and ranks higher than her sister Pippa Middleton, who is 47th.

The royal is praised for her "classic elegance", which has "set the high street alight".

Dannii Minogue, who has her own fashion label Project D, has made it in the top 20 at 16th, while her sister Kylie is at 45.

The only other Australian to rate a mention is supermodel Miranda Kerr at 25.

Harry Potter star and Burberry model Emma Watson slips from top spot in 2011 to second place in Glamour magazine's top 50.

Spice Girl turned fashion designer Beckham has shot-up 12 places to third, with the magazine praising the "adorable coordinating looks" she shares with "her new favourite accessory" - baby daughter Harper.

This year's top 10 is completed by flame-haired singer Florence Welch (fifth), actress Michelle Williams (sixth), Gossip Girl star Blake Lively (seventh), US socialite and reality TV star Olivia Palermo (ninth) and pop star Rihanna (tenth).

Stewart - Bella Swan in the hit Twilight films - is number one for transcending from "awkward teen to style queen" and for always being "effortlessly on-trend".

The US actress also tops the best-dressed couple rankings with her British boyfriend and co-star Robert Pattinson.

In the worst-dressed list, Katie Price is top, followed by Lady Gaga.

The five best-dressed couples are completed by British actor Orlando Bloom and Miranda Kerr, Beyonce and Jay-Z, German actress Diane Kruger and Joshua Jackson, and newly-engaged Angelina Jolie and Brad Pitt.

Glamour's 50 Best-Dressed Women of 2012 is voted for by readers.

Glamour Best-Dressed Women 2012

Top 30

1.Kristen Stewart

2.Emma Watson

3.Victoria Beckham

4.Duchess of Cambridge

5.Florence Welch

6.Michelle Williams

7.Blake Lively

8.Cheryl Cole

9.Olivia Palermo

10.Rihanna

11.Kate Moss

12.Alexa Chung

13.Kim Kardashian

14.Kelly Rowland

15.Keira Knightley

16.Dannii Minogue

17.Rosie Huntington-Whiteley

18.Fearne Cotton

19.Jennifer Lopez

20.Mila Kunis

21.Jessica Alba

22.Katy Perry

23.Angelina Jolie

24.Emma Stone

25.Miranda Kerr

26.Lady Gaga

27.Beyonce

28.Diane Kruger

29.Clemence Poesy

30.Jennifer Aniston

Worst-Dressed

1. Katie Price

2. Lady Gaga

3. Taylor Momsen

4. Kim Kardashian

5. Nikki Reed

PA