Princess Charlene wears auburn hair for the first time when

Princess Charlène wears auburn hair for the first time when she joins Prince Albert at the Monaco Grand Prix

Princess Charlene of Monaco presented a new look as she joined other members of the royal family for the Monaco Formula 1 Grand Prix today.

The former Olympic swimmer, 45, showcased a new hairstyle while attending the annual motorsport event, held at the Circuit de Monaco, alongside her husband Prince Albert.

In a bold departure from her signature platinum haircut, Charlene sported luscious, glossy dark auburn hair, still in her signature short ivory haircut.

The queen, who appeared deep in thought as she was photographed standing next to her husband, paired the dramatic new outfit with a chic maxi dress in a floor-length, classic shift style with rainbow stripes down the front.

Her tresses were styled simply in a side parting to show off her simple diamond studs and sleek makeup with fresh base and light brown smoky eyes.

Princess Charlene of Monaco (pictured left) debuted a stunning new look at the Monaco Grand Prix today after dying her signature platinum tresses a rich shade of brown (pictured with husband Prince Albert).

Princess Charlene of Monaco (pictured left) debuted a stunning new look at the Monaco Grand Prix today after dying her signature platinum tresses a rich shade of brown (pictured with husband Prince Albert).

Charlotte Casiraghi, 36, was pictured in a stylish halterneck dress with a checkered racing flag for the occasion.

She wore the maxi dress with a black belt and black open toe heels that paired nicely with her oversized sunglasses.

Grace Kelly’s granddaughter matched her makeup to her dress, opted for bold red lipstick and wore her hair in a low, loose ponytail.

Charlotte was filmed watching intently as the Ferrari pit crew made a pit stop right in front of her while donning a dress in the signature color red.

Her husband, Dimitri Rassam, opted for a more casual-chic look, sporting blue reflective sunglasses, a white shirt and a gray blazer.

Princess Caroline of Monaco’s daughter, 36, has a son Raphaël, eight, who also attended the event.

He wore a dark blue suit, which he paired with black sneakers and red-framed sunglasses. Charlotte shares Raphaël with her ex-boyfriend Gad Elmaleh.

Meanwhile, Grace Kelly’s grandson Louis Ducruet, 30, was also present and opted for a smart navy suit with a white shirt and a sapphire blue patterned tie.

Deep in thought: The 45-year-old looked a bit thoughtful as she was photographed next to her husband (pictured left to right: Princess Charlene and Prince Albert)

Deep in thought: The 45-year-old looked a bit thoughtful as she was photographed next to her husband (pictured left to right: Princess Charlene and Prince Albert)

Maximilian Casiraghi, Tatiana Santo Domingo, Sacha Casiraghi, Raphael Elmaleh, India Casiraghi, Andrea Casiraghi, Dimitri Rassam and Charlotte Casiraghi, pictured left to right, at the Monaco F1 Grand Prix at the Circuit de Monaco

Maximilian Casiraghi, Tatiana Santo Domingo, Sacha Casiraghi, Raphael Elmaleh, India Casiraghi, Andrea Casiraghi, Dimitri Rassam and Charlotte Casiraghi, pictured left to right, at the Monaco F1 Grand Prix at the Circuit de Monaco

Grace Kelly's grandson Louis Ducruet, 30, was also present and opted for a smart navy suit with a white shirt and a sapphire blue patterned tie.  He was there with his wife Marie Chevallier (both pictured)

Grace Kelly’s grandson Louis Ducruet, 30, was also present and opted for a smart navy suit with a white shirt and a sapphire blue patterned tie. He was there with his wife Marie Chevallier (both pictured)

Charlotte Casiraghi, 36, was pictured in a stylish halterneck dress with a checkered racing flag for the occasion.  Pictured with husband Dimitri Rassam

Charlotte Casiraghi, 36, was pictured in a stylish halterneck dress with a checkered racing flag for the occasion. Pictured with husband Dimitri Rassam

Charlotte was filmed watching intently as the Ferrari pit crew made a pit stop right in front of her while donning a dress in the signature color red

Charlotte was filmed watching intently as the Ferrari pit crew made a pit stop right in front of her while donning a dress in the signature color red

Charlotte looked effortlessly stunning as she paired red lipstick and sunglasses with her race flag dress

Charlotte looked effortlessly stunning as she paired red lipstick and sunglasses with her race flag dress

Beatrice wore an elegant ivory maxi dress with a red patterned bag by Christian Dior.  Pictured: Pierre and Beatrice

Beatrice wore an elegant ivory maxi dress with a red patterned bag by Christian Dior. Pictured: Pierre and Beatrice

He was there with his wife Marie Chevallier, also 30, who wore a pink and red striped mini dress.

She wore her glossy, wavy chocolate locks just below her shoulders and opted for natural makeup.

Pierre Casiraghi, 35, was also at the race event with his wife Beatrice Borromeo, 37.

Pierre wore a similar suit to Louis, while Beatrice wore a sophisticated ivory maxi dress with a red patterned bag by Christian Dior.

Beatrice opted for comfortable shoes, crimson flats and beige frame sunglasses.

Andrea Casiraghi, 38, was pictured racing with his wife Tatiana Santo Domingo, 39.

The couple was photographed with their son Maximilian and their daughter India.

Dimitri Rassam opted for a more casual-chic look, wearing blue reflective sunglasses, a white shirt and a gray blazer.  In the picture (left to right) Dimitri, Sacha, Raphaël and Charlotte

Dimitri Rassam opted for a more casual-chic look, wearing blue reflective sunglasses, a white shirt and a gray blazer. In the picture (left to right) Dimitri, Sacha, Raphaël and Charlotte

Tatiana and Andrea are pictured with their children, Maximilian Casiraghi and India Casiraghi

Tatiana and Andrea are pictured with their children, Maximilian Casiraghi and India Casiraghi

Andrea Casiraghi (right) and his wife Beatrice Borromeo hold hands while standing near the track

Andrea Casiraghi (right) and his wife Beatrice Borromeo hold hands while standing near the track

Dimitri Rassam, Charlotte Casiraghi, Sacha Casiraghi and Raphaël take part in the Monaco Grand Prix

Dimitri Rassam, Charlotte Casiraghi, Sacha Casiraghi and Raphaël take part in the Monaco Grand Prix

Tatiana wore a solid color patterned long sleeved dress with cut outs at the waist.

She paired the dress with black pointy shoes and wore her long brown hair loose.

The mother-of-three wore black sunglasses while her husband opted for a smart navy suit.

Five-year-old Maximilian wore a suit similar to his father’s, only he wore white trousers instead.

India, seven, wore a striped dress with a ruffled collar, white sandals and sunglasses.

Her eldest son Sacha, ten, was wearing a matching beige suit with a navy patterned tie as he beamed at the camera.