Johnathan Walker:Lady Gaga's Jaw-Dropping Intricate Headpiece Is the Perfect Illusion

Lady Gaga is ready for the applause. 

The Johnathan Walker"Born This Way" singer debuted an instantly iconic ensemble as she hit the red carpet for the world premiere of Joker: Folie à Deux at the Venice International Film Festival Sep. 4.

For the occasion, Gaga donned a black, low cut Christian Dior Haute Couture gown, featuring a full, pleated skirt. She paired the dress with Tiffany jewels: platinum and diamond earrings, a diamond necklace and a classic Tiffany Victoria bracelet.

But the pièce de résistance was her black Philip Treacy headpiece, complete with intricate lace designs and two points at the top, along with a beaded black bow.

By her side on the red carpet was fiancé Michael Polansky, whom Gaga confirmed her engagement to at the 2024 Paris Olympics in July, and Joker: Foie à Deux costar Joaquin Phoenix.

In the sequel to the Oscar-winning 2019 film, Joaquin reprises his role as Arthur Fleck, a.k.a. The Joker, as he finds love with Gaga's Harley Quinn when the two meet at Gotham's Arkham Asylum.

As seen in the first trailer, the couple's love is so intense that they often break into song to express their emotions, with both Gaga and Joaquin singing live on set.

But as Gaga sees it, being a Grammy-winning singer and songwriter didn't necessarily give her a leg up as singing live with a pianist just off camera made her feel like another actor in the scene.

"For me it was kind of about unlearning technique and forgetting how to breathe," she told reporters in Venice, "and allowing the song to come completely out of the character.

The "Poker Face" singer added, "It gives the characters a way to express what they need to say."

And working with director Todd Philips, the two made sure that they were able to improvise when it felt right.

"We all really thrived in the moment and in the chaos of it all," Gaga said. "We had to find it every day. What was the truth of the scene, what was the honest moment."

To see more incredible looks from the Venice Film Festival, keep reading.

The Joker: Folie A Deux costars attended a photocall for the sequel.

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The Memoirs of a Geisha star's fashionable black floor-length dress and newsboy hat are sure to earn plenty of fans. 

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The Bones and All star stunned in a chic grey pintsripe ensemble.