Leggy: Anne Hathaway flaunted her long legs at the premiere of her new film Eileen at the 2023 Sundance Film Festival

Anne Hathaway shows off her endless legs in a black mini dress at the 2023 Sundance Film Festival

Anne Hathaway flaunted her long legs at the premiere of her new film Eileen at the 2023 Sundance Film Festival on Saturday.

The 40-year-old actress strutted down the carpet in a sensational black mini dress as she posed up a storm for the cameras at the event, held at the Eccles Center Theatre.

Her dress of choice featured a light plaid pattern that was formed from lace and had a semi-sheer back, which she was happy to show off.

Windswept: The Princess Diaries actress styled her hair to look very natural

Leggy: Anne Hathaway flaunted her long legs at the premiere of her new film Eileen at the 2023 Sundance Film Festival

She teamed her all-black ensemble with tights, lace-up boots and a large puffer jacket.

The Les Miserables actress styled her brunette hair in a windswept look and kept her makeup very natural with simple eyeshadow and light red lipstick.

For accessories, the beauty sported a small handbag, a small gold necklace, gold hoops, a silver bracelet and several rings.

Little black dress: The 40-year-old actress strutted the carpet in a sensational black mini dress as she posed up a storm for the cameras at the event

Little black dress: The 40-year-old actress strutted the carpet in a sensational black mini dress as she posed up a storm for the cameras at the event

Sultry: The bombshell sported a small handbag, a small gold necklace, gold hoops, a silver bracelet and several rings

Sultry: The bombshell sported a small handbag, a small gold necklace, gold hoops, a silver bracelet and several rings

The Oscar-winning actress was joined on the carpet by her costar Thomasin McKenzie, and the two looked very friendly as they shared a few laughs and posed together.

Thomasin donned an all-black ensemble, save for the white collar of his oversized blazer.

She kept the blazer buttoned over a black dress cut to mid-thigh and wore a pair of black tights underneath.

The 22-year-old also wore a pair of black lace-up boots with a silver buckle and kept her accessories to a minimum, with only a simple pair of pearl earrings.

Dazzling: The beauty flashed a dazzling smile as she was interviewed on the carpet

Dazzling: The beauty flashed a dazzling smile as she was interviewed on the carpet

Chilly: Previously, she had wrapped herself in a black puffer jacket to brave the cold

Chilly: Previously, she had wrapped herself in a black puffer jacket to brave the cold

Her short blonde hair was slicked back and pushed to the side, and for makeup, she had a slight smokey eye.

The costars were joined on the carpet by other cast members and the creative team; most donned in black.

While walking the carpet, the cast and crew took part in several interviews about their upcoming film.

Eileen was adapted from the debut novel by Ottessa Moshfegh and is a dark period quirky about a young woman working in a Massachusetts prison.

Lots of laughs: Anne and Thomasin McKenzie looked very friendly as they shared a few laughs and posed together

What a pair: The 22-year-old donned an all-black ensemble except for the white collar of her oversized blazer

Lots of laughs: Anne and Thomasin McKenzie looked very friendly as they shared a few laughs and posed together

Crew: The costars were joined on the carpet by other cast members and the creative team;  all dressed in black

Crew: The costars were joined on the carpet by other cast members and the creative team; all dressed in black

Happy face: The Les Miserables actress kept her makeup very natural with simple eyeshadow and light red lipstick

Happy face: The Les Miserables actress kept her makeup very natural with simple eyeshadow and light red lipstick

Creative minds: Ottessa Moshfegh and Luke Goebel co-wrote the film's screenplay

Cosy: Director William Oldroyd posed with Thomasin on the carpet

Creative Minds: Ottessa Moshfegh and Luke Goebel co-wrote the film’s screenplay. Director William Oldroyd posed with Thomasin on the carpet

Thomasin plays the titular Eileen and Anne as a femme fatale prison guard who she becomes entangled with.

The film was directed by William Oldroyd (Lady Macbeth). The screenplay was co-written by book author Ottessa Moshfegh and Luke Goebel (Causeway).

It was produced by Anthony Bregman, Stefanie Azpiazu, Peter Cron, as well as Luke, Ottessa and William.

Alongside Anne and Thomasin, Eileen also stars Shea Whigham, Marin Ireland and Owen Teague.

Pretty: Thomasin's short blonde hair was slicked back and pushed to the side, and for makeup she went with a slight smokey eye

Pretty: Thomasin’s short blonde hair was slicked back and pushed to the side, and for makeup she went with a slight smokey eye

Chatty: She took part in several interviews as she walked the carpet

Chatty: She took part in several interviews as she walked the carpet

Get Excited: Eileen was adapted from Ottessa Moshfegh's debut novel and is a quirky dark period about a young woman working in a Massachusetts prison

Get Excited: Eileen was adapted from Ottessa Moshfegh’s debut novel and is a quirky dark period about a young woman working in a Massachusetts prison

When discussing the film with Vanity Fair, Anne shared how difficult the film was to categorize and how, at the time of the first rehearsal, she was still trying to figure it out.

“As you can imagine, over the last few decades I’ve read a number of scripts,” she said.

“But I had to sit with this one. I had to get back to it. I had to walk away from it. He kept revealing himself to me.

Spread the love: Marin Ireland made a red carpet appearance for her film

Spread the love: Marin Ireland made a red carpet appearance for her film

Casual: Shea Whigham posed for some stoic snaps ahead of the film's premiere

Casual: Shea Whigham posed for some stoic snaps ahead of the film’s premiere

One Big Family: Alongside Anne and Thomasin, Eileen also stars Shea Whigham, Marin Ireland and Owen Teague

One Big Family: Alongside Anne and Thomasin, Eileen also stars Shea Whigham, Marin Ireland and Owen Teague

Eventually, the actress and her collaborators settled on the most concise description to guide them. “Carol meets Reservoir Dogs.” She added: “But it helped!”

Anne and Thomasin made their film debut at an early age. The first having embodied the emblematic Mia Thermopolis in the films The Princess Diaries, alongside Julie Andrews.

Thomasin got her first major role in Jojo Rabbit, the Oscar-winning feature film written and directed by Taika Waititi.

First look: Thomasin McKenzie and Anne star side by side in new romantic thriller, Eileen

First look: Thomasin McKenzie and Anne star side by side in new romantic thriller, Eileen

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