Katherine Heigl Goes Brunette for New Role!

Katherine Heigl has ditched her blonde hair!

The 40-year-old actress took to Instagram on Tuesday (September 3) to share a selfie debuting her new, much darker hair.

PHOTOS: Check out the latest pics of Katherine Heigl

“If you haven’t caught my stories this will be a shock for you…#tullyhart #FireflyLane #nextroleforthisgal,” Katherine captioned the below photo.

It was announced over the summer that Katherine will be starring as Tully Hart in the upcoming 10-episode Netflix series Firefly Lane.

“Firefly Lane revolves around Tully and Kate, who meet as young girls and become inseparable best friends throughout 30 years of ups and downs, successes and failures, depression and disappointments. When an unthinkable betrayal breaks them apart the two women go their separate ways, and it’s unclear whether they’ll ever be able to reconcile,” according to the Hollywood Reporter.

If you missed it, Katherine recently discussed the possibility about returning to Grey’s Anatomy.