Amanda Seyfried is one of our favourite hair crushes, her long and impossibly glossy blonde hair regularly give us a case of the green eyed monster (how does she get it THAT shiny?). But for her role as porn star Linda Lovelace Amanda went for a completely different colour, dying her hair a warm brunette hue for the movie.

The actress proudly instagrammed herself in character, complete with her dark hair, saying: ‘LOVELACE opens today #shamelessselfpromotion’.

But alas, Amanda didn’t stick with the dark hair, instead walking the red carpet at the LA premiere of the movie this weekend with her hair back to its blonde best. But if you’re tempted by the dark side, it’s the hair colour for autumn/winter 13 and here’s the proof...

Tweet us @ELLEBEAUTYTEAM and let us know whether you think Amanda should have kept the brunette for autumn?

See ELLE’s best celebrity brunettes..

See Amanda’s Style CV here..

Follow Amanda on Twitter here..