Maggie Gyllenhaal, is that you?!

The 37-year-old actress stepped out looking almost unrecognizable on the set of her new TV show, The Deuce, in NYC on Wednesday, Nov. 4.

maggie gyllenhaal

Maggie on The Deuce set on Nov. 4, 2015.

For her latest role, the mom-of-two swapped her usual brunette pixie cut for shoulder-length blonde curls to portray Time Square prostitute Eileen "Candy" Merrell in the upcoming drama.

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The series — set to air on HBO — reportedly follows the rise of the porn industry in NYC during the 1970s.

Click through the gallery below to see more stars who’ve transformed themselves for roles!