Another royal wedding is on the horizon, this time in Monaco.

Princess Stephanie, 53, announced on Wednesday that her son Louis Ducruet, 25, is to marry his girlfriend Marie Chevallier, his college sweetheart who once worked as a cashier at a French discount supermarket.

The Palace's announcement, which was kept brief, mentioned the mother's 'joy' at the upcoming nuptials but didn't specify a wedding date.

Nuptial: Princess Stephanie, 53, announced on Wednesday that her son Louis Ducruet, 25, is to marry his girlfriend Marie Chevallier. Louis and Marie are pictured in an engagement shot

Spreading the word: Both of them have posted touching engagement photos while sharing their happiness with their followers

Gorgeous setting: The images see Louis down on one knee on a beach at the Four Seasons Resort The Nam Hai in Hoi An, Vietnam, popping the question in a dapper white suit

Sealed with a kiss: Marie, meanwhile, is wearing an emerald green dress in the shots, which see her pulling her future groom towards her for a kiss after she said yes

Globe trotters: The pair had recently been sharing series of photos of their trip in Vietnam, during which Louis proposed to Marie

'Her Serene Highness Princess Stephanie has the joy to announce her son Louis Ducruet's engagement with Miss Marie Chevallier,' the message reads.

Louis is Stephanie's eldest child with her former husband Daniel Ducruet, who was once the princess' bodyguard. This makes him the grandson of Princess Grace Kelly, Stephanie's mother, who married Prince Rainier III in 1956.

Grace tragically died in a car crash in 1982, and was survived by her children Stephanie, who was in the car with Grace during the fatal crash, Caroline, now 61, and Albert II, 59.

Stephanie had another child with Daniel, 23-year-old Pauline Ducruet, and also has a 19-year-old daughter, Camille Gottlieb.

Louis, who has no title but is 12th in the line of succession to the Monegasque throne, is the first of Stephanie's children to tie the knot.

Past: Louis and Marie both attended Western Carolina University, in Cullowhee, North Carolina. They have been dating for about five years

Important news: The Palace's announcement, which was kept brief, mentioned Stephanie's 'joy' at the couple's upcoming nuptials but didn't specify a wedding date

Jobs: Marie is now a banqueting and convention coordinator at the Hôtel Hermitage Monte-Carlo, while Louis works as a scout for the AS Monaco soccer club

Souvenirs: The two love birds have made sure to snap plenty of pictures together to capture their memorable trip in Vietnam

Dropping hints? Marie had previously shared this photo of herself holding a 'Happy wife, happy life!' paper bag

Louis is Stephanie's eldest child with her former husband Daniel Ducruet. The family is pictured in December 1992, two weeks after Louis' birth

Eldest brother: Louis (pictured as a two-wee-old baby with his mother) is the first of Stephanie's three children to tie the knot

The future newlyweds both attended Western Carolina University, in Cullowhee, North Carolina, where Louis earned a bachelor's degree in sports management and Marie studied marketing, Hello Monaco reported previously.

Marie is now a banqueting and convention coordinator at the Hôtel Hermitage Monte-Carlo, while Louis works as a scout for the AS Monaco soccer club.

Prior to earning her bachelor's from Western Carolina University, Marie obtained a Bachelor of Business Administration at Skema, a business school based in France, which Louis also attended.

Her previous jobs include distributing flyers and magazines on the street for an advertising agency in Nice, working as a supermarket cashier for the French discount store chain Leader Price, selling movie tickets and snacks for the French movie theater chain Les Cinemas Gaumont et Pathe, and being employed as a salesperson for France's state-owned railway company, the SNCF.

While at Western Carolina University, Marie was a French tutor. She was also an active member of the student union board at Skema.

Marie, who has been working at the Hôtel Hermitage Monte-Carlo for two years, shares her future husband's love of soccer, and cheered on the AS Monaco during the UEFA Champions League semi final first leg match in May last year.

Louis, meanwhile, also earned a Bachelor of Business Administration at Skema before studying at Western Carolina University. He started working at the AS Monaco as an intern and has been at his current position for two years.

Message: 'Let me introduce you the future madame Ducruet,' Louis (pictured with Marie and his uncle Prince's Albert II of Monaco) said in his post . 'She said yes and we are now engaged'

Happy: As for Marie (pictured with Louis and Stephanie in a file photo), she wrote : 'Proud to announce that, I said YES to the love of my life. I love you so so so much'

Careers: At Western Carolina University, Louis earned a bachelor's degree in sports management while Marie studied marketing. They are pictured in a file photo

Royals: Louis is the grandson of Princess Grace Kelly, Stephanie's mother. Grace and Stephanie are pictured together in July 1982 during the annual Red Cross Ball

The pair have dated for about five years, and often share sweet couple photos and loving messages for each other on their respective Instagram accounts.

Both of them have posted touching engagement photos while sharing their happiness with their followers.

The images see Louis down on one knee on a beach at the Four Seasons Resort The Nam Hai in Hoi An, Vietnam, popping the question in a dapper white suit.

Marie, meanwhile, is wearing an emerald green dress in the shots, which see her pulling her future groom towards her for a kiss after she said yes.

'Let me introduce you the future madame Ducruet,' Louis said in his post. 'She said yes and we are now engaged.'

As for Marie, she wrote: 'Proud to announce that, I said YES to the love of my life. I love you so so so much.'

The pair had recently been sharing series of photos of their trip in Vietnam, during which Louis proposed to Marie.

Together, they visited the former capital of Hoa Lu, the gorgeous Ha Long Bay, Ho Chi Minh City, the imperial city in Hue, and traveled on motorcycles in Hội An.

In each location, the two love birds made sure to snap plenty of pictures together to capture the memorable trip.

Official: Louis and Marie have often appeared at events together, and cheered on the AS Monaco during the UEFA Champions League semi final first leg match in May last year

Throwback: Marie appeared to love her life in the US and has expressed nostalgia for the years she spent in North Carolina, sharing a picture of her graduation in which she posed with Louis

Touching: In December 2016, Marie shared this touching tribute to her later father, writing in the caption: 'You will be missed. I love you Daddy'

Family: Marie posted this photo in 2014, while she was attending Western Carolina University, saying she'd had 'a wonderful weekend' with her mother during a five-day visit

Louis and Marie have attended events together for the past few years, and have been sharing couple selfies since 2013.

Marie, who has two older brothers and is a proud aunt, has called both Monaco and France home. She is an avid traveler who has journeyed around Europe, in the US, and within France.

Her travel snaps include views of Strasbourg and Nice, France, Barcelona, Spain, San Antonio and Dallas, Texas, and Hollywood.

She appeared to love her life in America and has expressed nostalgia for the years she spent studying in North Carolina, sharing a picture of her graduation in which she posed with Louis.

In December 2016, Marie shared a touching tribute to her late father on Instagram, posting a photo of herself in his arms as a child and writing in the caption: 'You will be missed. I love you Daddy.'

Fiancee: Marie (pictured with Louis in a social media snap), who has two older brothers , has called both Monaco and France home

Romance: Louis and Marie have made no mystery of their relationship and often post couple photos such as this one to demonstrate their profound love for each other

Siblings: Marie (pictured as a girl with her two older brothers) is now a proud aunt