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Best actress nominee Lady Gaga has been evoking Hollywood glamour since the start of the 2019 awards season -- from wearing a Judy Garland-esque periwinkle gown to the Golden Globes, to the knockout Tiffany's 128-carat yellow diamond necklace that she paired with a structural black gown by Alexander McQueen at the Oscars.
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The necklace was last seen worn by Audrey Hepburn at a "Breakfast at Tiffany's" photoshoot.
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Best supporting actress nominee Regina King, kept it simple and chic in a white, strapless Oscar de la Renta gown.
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King paired her Oscar de la Renta gown with diamond accessories.
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"Pose" star Billy Porter, one of the first to arrive, became one of the night's most talked-about stars when he arrived in a black velvet tux dress by Christian Siriano. The designer tweeted a gif of the actor spinning in his creation, saying it was an "honor to create this moment."
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The "Crazy Rich Asians" star Gemma Chan, consistently among the best-dressed during this year's awards season, wore a voluminous pink, high-collared dress by Valentino.
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Presenter Jennifer Lopez stunned in a long-sleeved, mirror embroidered Tom Ford gown. Earlier in the night, she tweeted a clip of her walking out onto the Oscars stage in 1999 in Badgley Mischka, reminding us, two decades on, JLo still reigns on the red carpet.
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Best actress nominee Glenn Close wore a gold dress and matching clutch, looking every bit the statuette she hopes to take home. The custom hand-embroidered dress by Carolina Herrera weighed 42 pounds and was made from 4 million beads.
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Award presenter Emilia Clarke wore a strapless, sparkly lilac gown custom-made by Balmain, while debuting a sleek new bob.
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Best supporting actress nominee Emma Stone wore a gold and reddish-brown gown by Louis Vuitton. Whether it was the exaggerated sleeves, or the interesting sequined texture, those on Twitter delighted in comparing her dress to various foods -- waffles, bacon, burned fish skin and even pizza.
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Spike Lee, nominated in the best director category for "BlacKkKlansman," paired his purple Ozwald Boateng suit with gold Jordans, a necklace bearing Prince's symbol and rings reading "Love" and "Hate," a tribute to his 1989 film, "Do the Right Thing."
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The "Crazy Rich Asians" star Michelle Yeoh has worn Elie Saab to numerous red carpets this year. This time, she paired a shimmery, off-shoulder gown with a showstopping bracelet by Chopard and watch by Richard Mille.
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Best supporting actress nominee Amy Adams wore a figure-hugging white gown with silvery zigzag accents. Adams paired the Versace gown with diamond accessories.
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Best actress nominee Melissa McCarthy was one of several actresses, along with Elsie Fisher and Awkwafina, who wore powerful-looking pantsuits on the red carpet. McCarthy wore a black and white ensemble by Brandon Maxwell, complete with a flowing white cape.
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Award presenter Chadwick Boseman was one of the few men who didn't play it safe, wearing a textured black and blue floor length jacket by Givenchy. The "Black Panther" star consistently wears patterned blazers to red carpet events.
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Oscar presenter Awkwafina had a bit a fun of at this year's awards ceremony, wearing a sparkly lavender pantsuit and pussy bow.
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The Crazy Rich Asians star also accessorized with a clutch that doubled as a tequila-filled flask.
CNN  — 

With the 2019 awards calendar reaching its grand finale at the Oscars Sunday evening, so too does a season of show-stopping red carpet fashion.

While the tone was relatively restrained – compared with the bold statements of recent award ceremonies, at least – many stars had saved their best for last.

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Regina King attends the 91st Annual Academy Awards at Hollywood and Highland on February 24, 2019 in Hollywood, California.

All eyes were on the best actress nominees as they arrived at the Dolby Theatre in Hollywood from mid-afternoon. Lady Gaga evoked the spirit of vintage Hollywood in a stunning black Alexander McQueen dress. She completed the look with with elegant evening gloves and a diamond Tiffany’s necklace once worn by Audrey Hepburn.

Fellow nominee Melissa McCarthy was among a number of actresses seen sporting powerful pantsuits, wowing onlookers in a black and white ensemble by Brandon Maxwell. “The Wife” star Glenn Close, meanwhile, wore a gold Carolina Herrera dress (in a shade not dissimilar from the statue she hoped to take home) created from an astonishing 4 million beads.

The supporting actress nominees arguably eclipsed their lead actress counterparts, however, with Regina King and Amy Adams both opting for sophistication over spectacle. Emma Stone proved more divisive: Her elaborately sequined floor-length gown sparked widespread debate on social media, where it drew gastronomical comparisons from waffles and honeycomb to burned fish skin.

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Best Supporting Actress nominee for "The Favourite" Emma Stone arrives for the 91st Annual Academy Awards at the Dolby Theatre in Hollywood, California on February 24, 2019.

Elsewhere, pink proved to be the color of the night. It came in all shades imaginable, from Marie Kondo’s joy-sparking powdery pink gown to Angela Bassett’s one-shouldered hot-pink Reem Acra dress.

The color appeared in a variety of shapes and styles too. “Green Book” actress Linda Cardellini and country singer Kacey Musgraves both arrived in layers of breathtaking pink ruffles; screen legend Helen Mirren wore a playful pink tulle gown; and “Forever” star Maya Rudolph wore a pink floral number paired with a cape.

Jason Momoa even joined the trend, donning a light pink Fendi tuxedo. The actor’s wife, Lisa Bonet, wore a complementary number, also by Fendi.

In the absence of a host (following Kevin Hart’s decision to withdraw over a series of homophobic tweets), the spotlight fell on the presenters tasked with keeping proceedings running smoothly. Of them, “Game of Thrones” actress Emilia Clarke stood out in a sparkly lilac gown, custom-made by Balmain, while sporting a new, sleek bob.

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Actress Gemma Chan arrives for the 91st Annual Academy Awards at the Dolby Theatre in Hollywood, California on February 24, 2019.

Also among the presenters were members of the “Crazy Rich Asians” cast. The movie may not have picked up any Oscar nominations, but its stars were out in force, continuing a dazzling run of form on this season’s red carpets.

Michelle Yeoh stunned in a shimmery Elie Saab gown, while Constance Wu looked glamorous in a vibrant off-the-shoulder yellow Versace gown. Gemma Chan continued the night’s pink-colored palette in a bright Valentino Couture gown and Awkwafina wore a sparkly lavender pantsuit.

By and large, the men played it safe, with muted tones and sharp tailoring reigning large. Rami Malek and Bradley Cooper were among the male nominees demonstrating how to make a classic black tux look effortless.

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Billy Porter arrives at the Oscars on Sunday, Feb. 24, 2019, at the Dolby Theatre in Los Angeles.

But there are certain male stars we’ve come to expect something something special from, including Billy Porter (who had previously worn a pink-lined cape to the Golden Globes, and a silky jumpsuit with enormous orange bow to the Critics’ Choice Awards). And he didn’t disappoint. One of the first arrivals on the red carpet, Porter stole social media’s gaze with a gender-defying velvet tuxedo gown.

While not quite as outlandish, Spike Lee also stood out in a purple Ozwald Boateng suit and matching cap. The “BlacKkKlansman” director completed the look with a pair of custom gold Air Jordans and a necklace paying homage to pop legend, Prince.

Scroll through the gallery for some of the night’s most memorable looks.

CNN’s Oscar Holland, Stephy Chung and Heather Fulbright contributed to this report.