Katherine Heigl Has Dyed Her Signature Blonde Hair Dark Brown

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Celebrity hair transformations are a dime a dozen - just look at the Kardashians who go from short bobs to long mermaid hair almost hourly. But some celebrities never deviate from their signature style and Katherine Heigl is most definitely one of them.

Since she burst onto the scene in Grey's Anatomy over 14 years ago, the actress has been blonde, but for her new role in Netflix's upcoming series Firefly Lane, she had a total makeover and was almost completely unrecognisable on Instagram this morning with dark brunette hair.

Here's the Katherine we're used to seeing:

katherineheigl View Profile

And this is her brunette:

katherineheigl View Profile

The 40-year-old uploaded a few progress pics to Instagram before sharing her final look, noting that the process would take a while (it took three hours) so she stocked up on champagne and books.

This article originally appeared on Marie Claire.

Isabelle Truman

Isabelle is marie claire and InStyle's Senior Digital Fashion & Features Editor. She's usually found searching for the food at events while simultaneously posting Instagrams or watching reruns of 'Sex and the City'. Her work has taken her cafe hopping with Jacinda Ardern, to Sweden with H&M and to movies with Margot Robbie.