James Franco
has traded in his signature brunette mane for a blonde new 'do!

The "Spring Breakers" star showed off his bleached hair at a photo call for "Oz: The Great and Powerful" alongside costars, Mila Kunis and Michelle Williams (who looked great!), on Tuesday.

We're guessing the 34-year-old changed up his look for an upcoming new role -- but we have to say, the lighter color doesn't look half bad on him!

We do, however, prefer Franco with his natural hair color ... bleached hair (on guys) is so early '00s. Really hope the whole iced tips look doesn't make a comeback.

Click "Launch Gallery" below to vote on James' new 'do and on other stars who've gone blonde and brunette!


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