Before they said "I do," Lauren Burnham organized a very silly wedding day prank on Arie Luyendyk Jr.

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Lauren Burnham picked the most unexpected day to prank Arie Luyendyk Jr.: at their wedding!

As The Bachelor couple continues to share photos from their lavish ceremony in Hawaii, new details are coming out about the sweet, and silly, moments leading up to when they said “I do.”

On Thursday, Luyendyk, 37, shared a series of photos on his Instagram, revealing how his bride-to-be fit in one big prank on their special day.

“FIRST LOOK… >>>>>>>>,” the former Bachelor wrote alongside a slideshow of images from the moment he turned around to get his “first look” at Burnham, 27, in her white dress.

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Arie Luyendyk Jr. and Lauren Burnham
| Credit: ABC/Lorenzo Bevilaqua

However, that wasn’t who was waiting for him.

In the images, Luyendyk found himself face to face with one of the couple’s male pals, who was wearing a wedding dress while casually drinking a beer.

“I can’t even begin to tell you how shocked I am, currently planning on how to get her back,” Luyendyk added alongside the prank photos. “S/O to @drhallo, you’re a legend for playing along and I’m sorry this will be all over the internet in a few minutes lol!”

The couple exchanged vows on Jan. 12, 2019, and while every detail of the nuptials was hand-selected, Burnham took inspiration from a popular teen movie to get the look just right.

The newlyweds — they are expecting their first child together, a baby girl — shared their first kiss as a married couple under a custom arch similar to that of Bella and Edward Cullen’s in Twilight: Breaking Dawn — Part 1.

“She sent photos of the Twilight ceremony scene to show the hanging florals and arch,” a source previously told PEOPLE.

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Arie Luyendyk Jr. and Lauren Burnham
| Credit: Megan Firestone/Instagram

“It was an amazing day. Arie and Lauren wrote their own vows and both of them got choked up,” a source told PEOPLE of the celebration, which Bachelor host Chris Harrison officiated.

RELATED VIDEO: A Bachelor Baby! Arie Luyendyk Jr. and Lauren Burnham Are Expecting Their First Child

The wedding came 10 months after getting engaged on The Bachelor‘s After the Final Rose special following the controversial finale, when Luyendyk proposed to final pick Becca Kufrin.

“Love is not always perfect,” Luyendyk told PEOPLE in March. “Everyone finds each other in a different way. It’s not always a fairy tale, but as long as Lauren and I have each other, we’re happy.”