EW’s Clarissa Cruz and Joshua Rothkopf go behind the mask of actorly transformation: Sometimes it's makeup and hair, other times it's vocal training and pure chops, and increasingly, it's facial prosthetics. From Nicole Kidman in 'The Hours' to Jared Leto doing his thing in 'House of Gucci'. Then, stick around for our interview with Jessica Chastain, changed from the inside out into Tammy Faye Bakker in 'The Eyes of Tammy Faye.' For complete awards coverage, go to EW.com/awardist.

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