Lady Gaga ditched her signature blond locks for a black hairstyle in new pics she posted on Instagram Thursday. Instagram/@ladygaga

She’s marrying the night.

Lady Gaga surprised fans with a new dark hairstyle on Instagram Tuesday, and along with her fresh color, she announced a surprise single with Bruno Mars.

The “Bad Romance” singer, 38, teased the duet by sharing a video of herself playing the piano in some of the “24K Magic” crooner’s merch, showing off her newly dyed black hair for the first time in the process.

Lady Gaga rocked bleached brows and black hair in Thursday’s Instagram post. Instagram/@ladygaga
She revealed her black hair on Instagram Tuesday. Instagram/@ladygaga
Lady Gaga and Bruno Mars will release their duet, “Die With a Smile,” at 9 p.m. PST Thursday. Instagram/@ladygaga
She’s known for her platinum blond hair. Instagram/@ladygaga

Gaga, who normally rocks platinum blond hair, also shared a pic of her updated look on Instagram Thursday morning, posing against a wall in a leopard print coat and enormous white sunglasses.

The “Poker Face” singer then shared a promotional photo for her new single with Mars, “Die With a Smile” — which releases at midnight EST Friday — wearing a curly honey blond wig and matching the “Uptown Funk” musician in shades of bright blue and red.

Both pop stars rocked retro outfits for the pic, with Gaga sporting red tights and a super-short blue minidress with a red bow-tie blouse underneath while Mars wore a blue suit and unbuttoned red dress shirt with a cowboy hat.

Unsurprisingly, fans went wild for her hair transformation, like one who wrote, “THE DARK HAIR IS GIVING ICONIC ERA.”

Gaga still sported blond locks during her Paris Olympics performance in July. dpa/picture alliance via Getty Images
She stars in the upcoming “Joker: Folie a Deux” movie with Joaquin Phoenix. GC Images
The actress and pop star recently called boyfriend Michael Polansky her “fiancé.” ladygaga/Instagram

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“hot girls have no brows and black hair,” another commented, while a third fan wrote, “Brunettega is back! 😍.”

One called it a “legendary look” another others compared her to “Brat” singer Charli XCX as well.

The new single drop (and new look) comes at an exciting time for the “A Star is Born” actress, who performed at the opening ceremony of the 2024 Paris Olympics last month.

She also seemingly confirmed her engagement to boyfriend Michael Polansky while chatting to France’s prime minister, Gabriel Attal at a swimming event, referring to him as her “fiancé” in a video Attal posted on TikTok.

Plus, she’s getting ready for spooky season as her forthcoming “Joker: Folie à Deux” movie hits theaters this October.

As for her black hair era, stay tuned to see if it sticks around.

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