LOS ANGELES: Beating the Duchess of Cambridge and Victoria Beckham, Twilight actress Kristen Stewart has been designated the world’s best-dressed woman, and also tops the best-dressed couple ranking with co-star and boyfriend, Robert Pattinson.

Stewart who plays Bella Swan in the hit Twilight series – has transcended from "awkward teen to style queen" for always being "effortlessly on-trend".

This pushes Harry Potter’s Emma Watson, who reigned on the top in 2011, to second. Spice Girl turned fashion designer Victoria Beckham has shot up 12 places to third, with the co-ordinating looks she shares with baby daughter Harper.

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