Joe Manganiello Serenades Sofia Vergara in Sweet Moment at Pre-Wedding Party

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Joe Manganiello is such a romantic!

Sofia Vergara and the Magic Mike 2 star treated their wedding guests to a dessert party at the Ponce De Leon ballroom inside The Breakers hotel Saturday night. The celebrations included live music, featuring a performance by Columbian singer, Jorge Celedon.

PICS: Check Out All of Sofia's Stunning Wedding Weekend Fashion!

The Modern Family star danced and sang, although it wasn’t long until Manganiello took over the mic and turned up the heat.

In the sweet moment, the actor serenaded his wife-to-be with the song “Sweet Child O’ Mine” and even planted a big kiss on Vergara as she danced close to the stage, seeming to really enjoy his performance.

A dessert table lined the walls under a sign that read, "Let Them Eat Cake." Guest could choose from a large variety of sweets to nosh on, while also enjoying delicious cocktails. ET has learned that the the couples actual wedding cake will be made by Sylvia Weinstock.

The star looked beautiful in a custom Mark Zunino cocktail dress, while her future husband wore a black suit.

Before the dessert party, wedding guests were whisked away to a lavish rehearsal dinner at the Brazilian Court Hotel on lux buses.

The beautiful dinner took place in the hotel’s courtyard underneath a tent covered in what appeared to be hundreds of white twinkle lights and Vergara wore first dress of the night.

Guests dined on a three-course meal, which included a shredded kale salad with apple, walnut, picked blueberries, blue cheese, dill and buttermilk dressing; then their choice of a wood roasted chicken or 14 oz. grass fed beef striploin; followed by chocolates for dessert.

Red roses were pilled along the center of the table surrounding tall crystal candle holders, while the floral detail could also be seen on the menus. Adorable custom Wedding Paper Divas cocktail napkins were placed around the table with the phrase “He had me at hola” written on them as well as the date.

Vergara kept her look bridal wearing an all white dress with a detailed top and bottom that showed of her curves. Manganiello wore a black tux.

The couple appeared to party all night, sharing a photo walking hand in hand around 2 a.m.

Back in their hotel rooms, wedding guests were treated to welcome gift bags from the bride and groom. The bags included Aquardiente, a Colombian scarf, popcorn, Pittsburgh pretzels, salt water taffy, and her perfume!

The pair will tie the knot Sunday in front of 400 guests, including Reese Witherspoon, Sarah Hyland, Eric Stonestreet, Jesse Tyler Ferguson, Georgina Chapman, Harvey Weinstein, Channing Tatum, Ty Burrell, Ed O'Neill, Ariel Winter and Anna Paquin.

Although we are not sure exactly what the actress' dress will look like for big day, we do know that celebrity jeweler Lorraine Schwartz will be making sure she sparkles as she walks down the aisle. Since Georgina Chapman is in attendance does that mean the blushing bride will be wearing Marchesa at some point during the occasion? We will have to wait and see!

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