Lovely Kate Middleton celebrates a milestone Monday -- turning 30 -- and no doubt, she’s doing it in royal style!

RadarOnline.com is marking her big day with a look at some of her most memorable fashion moments.

The down-to-earth beauty has become a style icon traveling the world in outfits by some of her favorite designers such as Daniella Issa Halleyal and Alice Temperley.

PHOTOS: Princess Of Style Kate Middleton Turns 30

Her stunning wedding dress made Sarah Burton one of the world's best-known fashion designers.  She and another of Kate's favorites, Erdem Moralioglu were nominated for British Fashion Awards this year.