Efron first showcased his platinum locks early on Saturday during an appearance at IMDb Studio alongside his fellow "Extremely Wicked, Shockingly Evil and Vile" cast members.

That evening, the 31-year-old actor winked at photographers as he arrived at the premiere of the new film at the 2019 Sundance Film Festival in Park City, Utah.

Fans outside the Eccles Center Theatre were certainly excited to see Efron, who was dressed in jeans and a tshirt and an olive-coloured jacket with a shearling collar.

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The look was quite a change to the sleek, all-black ensemble that Efron, typically a brunette, wore to the Golden Globes earlier this month.

"Extremely Wicked, Shockingly Evil and Vile" will see Efron portray notorious serial killer Ted Bundy, who confessed to committing 30 murders in at least seven states over the span of four years, escaped from jail twice, and was executed in January 1989.

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You can see Efron as Bundy in the photo below:

The film also stars Lily Collins as Elizabeth Kloepfer, Bundy's girlfriend; Jim Parsons as lead prosecutor Larry Simpson; and Kaya Scodelario as Carole Ann Boone, Bundy's ex-wife.

The cast gathered for a photo on Saturday outside of the film's Sundance premiere.

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