Sealed with a royal kiss!

Louis Ducruet — the son ofMonaco’s Princess Stéphanieand the grandson ofPrincess Grace(formerly American actress Grace Kelly) — and Marie Chevallier celebrated theirroyal weddingover the weekend and had their first kiss as a married couple in front of 200 guests.

After acivil ceremonyon Friday, the romantic moment took place inside Monaco’s Cathedral on Saturday — a departure from thetradition of the British royals, who wait until they step outside the chapel for their first kiss.

“Some view the church as a holy place so they won’t kiss in the church out of respect, but many vicars throughout the church of England will ask the couple if they want to kiss,” Myka Meier, Beaumont Etiquette founder and expert in all things proper, tells PEOPLE.

Luci-Bebert-Nebinger / Prince’s Palace of Monaco

Friday, July 26th, Mr. Louis Ducruet, the oldest son of s.a.s. princess Stephanie and m. Daniel Ducruet, married miss Marie Chevallier at a civil ceremony celebrated at the city hall of Monaco by m. Georges Marsan, the mayor.

Prince HarryandMeghan Marklesaved their first kiss as a married couple for outside, locking lips on the steps of St. George’s Chapel after saying “I do” at Windsor Castle.Prince WilliamandKate Middletonexchanged their vows at Westminster Abbey, but it wasn’t until their appearance on the Buckingham Palace balcony that the public witnessed their post-wedding kiss. Both couples followed in the footsteps of royals before then, even their parentsPrincess DianaandPrince Charles.

Prince Harry and Meghan Markle on their wedding day.Ben STANSALL - WPA Pool/Getty Images

Prince Harry Marries Ms. Meghan Markle - Windsor Castle

Anwar Hussein/WireImage

The Wedding of Prince William with Catherine Middleton - Buckingham Palace Balcony

Louis and Marie, who met as college students, held their religious ceremony at the principality’s Cathedral of Our Lady Immaculate, which was also where the historic wedding of Louis’ grandmother and grandfather —Grace Kelly and Prince Rainier II— took place in 1956.

Despite the grandiose setting of the cathedral, the wedding party consisted primarily of close family and friends, in keeping in line with the couple’s wishes.

Friday, July 26th, Mr. Louis Ducruet, the oldest son of s.a.s. princess Stephanie and m. Daniel Ducruet, married miss Marie Chevallier at a civil ceremony celebrated at the city hall of Monaco by m. Georges Marsan, the mayor.

Although Louis does not bear the formal title of prince, the eldest son of Princess Stéphanie (and first of her three children to wed) is currently 15th in the principality’s line of succession. Louis currently works for the professional soccer team Monaco AS as its chief recruiter. Marie is an events project planner for the principality’s hotel and casino operator, SBM.

source: people.com