I agree Wolkfolk. You can have the greatest stylist in the world, access to the best designers, but if you can't carry the clothes, it won't work. Rooney is not a classic beauty, but she has that flawless pale skin, and figure that is made for those minimalist and sometimes complicated designs a lot of actresses can't carry. She knows what she likes and what looks great on her. However, I still think her daily/street style is boring. Great coats, great boots, but dull imho.
ETA--Love all the braids and buns she has been doing with her hair on the red carpet. Goes well with whatever she's wearing.