Tatiana slipped into an elegant white lace dress, not dissimilar from the full length ivory Missoni wedding gown she got married in, while some of her guests chose more brightly coloured outfits.
Andrea changed into a smart dinner suit, complete with a bow tie, and was spotted leaving the Hotel de Paris with his new wife as they headed to their reception.
Elisabeth von Thurn und Taxis posted a photo on Instagram of several guests wearing fluorescent wigs to top off their stylish and chic outfits.
"Anyone seen these girls?" wrote Elisabeth alongside the photo. "Not me! #funfunfun #tatianaandandrea @olympiascarry @dashaz8 @thelsd."
"Anyone seen these girls? Not me! #funfunfun #tatianaandandrea"
Elisabeth also provided an inside view of the occasion by posting a photograph of the luxury gelato stall which was supplying the guests with sweet treats.
"Every good wedding needs and ice cream vendor! @victorydp #tatianaandandrea #monaco #wedding" wrote Elisabeth with the picture of herself next to the stand.
Nati Blaskovicova, another close friend of the newlyweds who had been posting photograph throughout the day, uploaded a an image of herself and a fellow guest in the early hours of Sunday morning, as they partied the night away.
On Sunday it was time for Nati and the other guests to bid the wedding party their farewells and she uploaded an image of herself with the caption "Ciao Monaco."
"Every good wedding needs and ice cream vendor!"
Andrea and Tatiana officially said 'I do' around midday on Saturday in a romantic ceremony at the Prince's Palace. Loud applause and cheers of congratulations were heard in the principality as Princess Caroline's son wed his longtime love, Tatiana.
After the ceremony was over the couple, who are parents to baby Sacha, hosted an al fresco lunch in by the Palace's pool for their 400 guests.
Six barrels of beer straight from the Brasserie de Monaco were delivered to the famous address and Tatiana's brother, Julio Mario Santo Domingo III was photographed enjoying a glass of the luxury beverage.
Andrea and Tatiana's female guests pulled out all their stops with their elegant and colourful outfits, showing off an array of patterned Dolce & Gabbana dresses and accessorising with quirky sunglasses and garlands of flowers.
The reception's theme was a continuation of that at Tatiana's boho chic pre-wedding party, which took place on her mother-in-law Princess Caroline's luxury yacht, Pacha III.
Andrea and Tatiana have been together for more than eight years after meeting in Paris when they were both students. The pair were introduced by Andrea's younger sister, Charlotte Casiraghi, who went to school with fashion businesswoman, Tatiana.
The newlyweds, who have both lost their fathers, have supported each other through the good and the bad. Princess Caroline, who enjoyed a close relationship with Tatiana, has credited the Colombian beauty as helping Andrea mature and take his royal duty more seriously.