How to have eyebrows like Kaya Scodelario?

I'd like to know how can you have eyebrows like Kanya has, I mean, like she has these full, thick dark eyebrows, how can I get the same effect when mine are the opposite?

Kaya:

http://i2.listal.com/image/1155157/600full-kaya-scodelario.jpg
http://i2.listal.com/image/1595207/936full-kaya-scodelario.jpg
Update: Also, can you use castor oil on your eyebrows or eyelashes to make them thicker and darker?
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