This is a picture of Keira from the Golden Globe Photoshoot in 2006. She looks very pretty with a light touch of makeup and her hair in a loose half ponytail.

Hair
This looks like Keira's natural hair pulled back and secured. If you have straight hair, you can follow the below tutorial.
[01] Curl your hair with a curling iron.
[02] Take a brush and brush your hair through, once the curls have cooled. (If you brush your hair while your head is still hot, your curls won't hold!).
[03] Your hair should look naturally wavy now. If it doesn't, keep brushing it through until the curls start to get looser and bigger.
[04] Use a hairband or clip to pull half of your hair back and secure it loosely at the back of your head.
Or, alternatively, you can choose the fast way:
[01] Towel dry your hair and scrunch it with a gel until it gets dry. Use a dryer while scrunching, if necessary.
[02] Pull your hair back in a half pony tail.

Makeup
[01] This is a natural look so just apply a bit of pressed powder or a cream shadow and smudge a little bid below bottom lashline.
[03] Then line eyes with a dark brown eyeliner in Mambo.
[04] Apply a few coats of a black mascara in Black Orchid.
[05] Last but not least, apply a bit of lip gloss in Sweet Charity.