Jessica Alba blond hair pics: Actress goes ombre for role in 'Sin City' sequel

Jessica Alba is getting into character for the follow-up to 2005's "Sin City," and part of preparing to revive her role as stripper Nancy Callahan in next fall's "Sin City: A Dame To Kill For" means going blond -- at least partially.

The 31-year-old actress documented her transformation from brunette to ombre locks on Twitter, posting photos and updates over the multiday process.

"Bye bye brown hair," she writes on Wednesday (Aug. 23) along with a pic of her still-dark hair.

Her hair was in the capable hands of stylist Rober Ramos of Estilo Salon in Los Angeles, and we think it looks pretty awesome. Check out the transformation below.

Bye bye brown hair w @nicowarren86 @robertramosprod instagr.am/p/OrzJJRsuvx/

-- Jessica Alba (@jessicaalba) August 23, 2012

Stage 1 -ok it doesn't look that different but it's a process rt @ robertramosprod! instagr.am/p/OsLAgoMuix/

-- Jessica Alba (@jessicaalba) August 24, 2012

Stage 2 of #SinCity2 Nancy hair instagr.am/p/OxiE11Muks/

-- Jessica Alba (@jessicaalba) August 26, 2012

She got roots that Nancy #sincity2instagr.am/p/Oxni5Dsuph/

-- Jessica Alba (@jessicaalba) August 26, 2012