15 of Jeff Bezos and Lauren Sánchez's best style moments

While Bezos walked the blue carpet in a marble-esque blazer, Sánchez stood out in a sparkling black-and-red gown.

Her dress had long sleeves made from polka-dot mesh, a plunging neckline that reached her navel, and a thigh-high slit. The daring gown also had an all-over geometric print that sparkled in the light.

Bezos attended in a traditional tuxedo with thick lapels, a white button-up shirt, and a black bow tie.

Sánchez mirrored him in a black mermaid-style gown. It had thin straps, a ruffled lace neckline, and a matching black band around the waist. She accessorized with a diamond cuff on her wrist.

At the 2022 premiere of "The Lord of the Rings: The Rings of Power," for example, Bezos sported a gray suit comprised of a sharp blazer, pleated trousers, and a lighter-toned undershirt.

Sánchez kept things even simpler in a white asymmetrical gown from Tom Ford. The body-hugging piece had a single shoulder strap, a fitted waistline, and a skirt slit that revealed her gold sandals.

Bezos posed for photographers in a black suit, which he wore with a white undershirt and satin tie.

Sánchez took the opposite approach with her outfit, wearing a vibrant red gown covered in tiny sparkles. She also wore silver sandals and a diamond bracelet.

Sánchez showed the edgy side of her style in a minidress from the Italian designer. Its black fabric sparkled as she moved, and black belts crisscrossed over the garment.

She wore it with semi-sheer tights and pointed pumps.

Bezos, on the other hand, swapped his usual tuxedos for a sleeker suit. He wore a dark T-shirt underneath a lighter jacket and completed the outfit with shining dress shoes.

Sánchez's Elie Saab gown had off-the-shoulder sleeves that created a plunging V-neckline. The form-fitting bodice was actually a bodysuit, and a semi-sheer skirt with strips of sparkly black fabric sat atop it.

Bezos kept his look simple in a black tuxedo.

Bezos wore multiple neutral shades for the event, pairing a pale gray shirt with a taupe jacket, white pants, and taupe shoes.

In contrast, Sánchez wore a form-fitting red gown with embellished spaghetti straps and clear heels.

Sánchez's sparkly minidress from Staud, which had a slit on one side, had a celestial theme, as it was adorned with constellations. She accessorized with silver shoes and jewelry.

Bezos paired his short-sleeve black T-shirt and pants with a chic vest.

The couple embraced the mob wife trend for the Dolce & Gabbana party, wearing coordinating looks from the designer. Bezos wore black-on-black with a velvet suit and a black button-down, which he wore with no tie.

Sánchez's dress was more daring, as the figure-hugging gown had a corset bodice and was made entirely of sheer black lace. She wore a blazer jacket with a black rosette on her shoulders, open-toe shoes, and oversize sunglasses.

Bezos wore a charcoal suit to the dinner, which he dressed down with a black T-shirt and black shoes.

Sánchez chose a long-sleeve, black dress for the event. The garment hit her at the ankle, showing off black heels, and had a plunging neckline. A choker completed her look.

Both Sánchez and Bezos wore Lever Couture to Vanity Fair's party.

Bezos' black tuxedo was simple, but he added a diamond brooch to his lapel to elevate the ensemble.

Sánchez wore a red ball gown with a dramatic train. The dress was made of tulle that fell in ribbons, creating volume on the sleeves and skirt and emphasizing the plunging neckline and form-fitting bodice. Her nude shoes and diamond necklace gave the look a timeless feel.

Bezos and Sánchez attended the White House state dinner held in Japanese Prime Minister Fumio Kishida's honor on Wednesday.

While Bezos attended the dinner in a traditional black tuxedo, Sánchez wore a deep-red dress styled by Kelly Johnson. The off-the-shoulder gown featured a semi-sheer corset bodice made of lace, contrasting with the silky skirt.

Gold heels with leaf detailing and a sparkly silver bag completed Sánchez's bold look.

Sánchez chose Oscar de La Renta for her Met Gala debut, wearing a strapless gown from the designer.

The black bodice had a simple sweetheart neckline, while a mosaic of fabric that created roses covered the full skirt and train.

On the red carpet, Sánchez told Vogue she thought the gown was "extremely unique and has a sense of femininity."

Bezos didn't walk the red carpet with his fiancée, but he joined her at the top of the Met steps in a classic black tuxedo.

Sánchez and Bezos could have been mistaken for a bride and groom at the Beverly Hills event in March.

The Amazon founder wore a black suit, a white undershirt, a matching bowtie, and a diamond brooch. Sánchez stood beside him in a strapless white Oscar de la Renta ball gown decorated with feathers.

The outfits seemingly nodded to their coming wedding, which is said to be taking place in Italy over the summer.

Bezos kept things simple with a black tuxedo, matching bowtie, and white undershirt. Sánchez, however, brought the glamour.

She wore a red, sleeveless gown — made by John Galliano in 1994 — that was previously worn by Sophia Loren. It had an asymmetrical bodice with a low neckline, form-fitting fabric across the waist, and a skirt that flowed around her ankles.

She completed the flashy outfit with diamond earrings, a statement necklace, and a crystal-covered clutch designed by Judith Leiber to look like an astronaut.