The Bachelor couple Arie Luyendyk Jr. and Lauren Burnham partied in Las Vegas together this past weekend for a big pre-wedding celebration with their friends.

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Based on pictures on social media, Arie and Lauren had a joint bachelor/bachelorette party at the Venetian hotel in Vegas, which included moments spent together as a couple as well as separate events for the men and women.

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The trip included romantic moments for Arie and his pregnant fiancee, such as a gondola ride and feasting on giant his-and-her sundaes.

But Arie, 37, and Lauren, 27, also took respective photos with their group of friends.

In one picture on Arie's Instagram, his male friends toasted their whiskey on the rocks to his upcoming nuptials.

"Still recovering... Bach/Bachette party at @venetianvegas was insane. A lot of pics we can't post, but that's what Vegas is all about right? #doug #ringtoss #daddidollars," Arie wrote.

And in one picture on Lauren's Instagram, the blonde beauty was flanked by six women from The Bachelor's 22nd season -- Jenna Cooper, Jacqueline Trumbull, Jenny Delaney, Maquel Cooper, Marikh Mathias, and Seinne Fleming -- whom she had competed against to win Arie's heart earlier this year.

Arie and Lauren also showed off their suites at the hotel. A giant "Bride to Be" balloon and other pink balloons decorated Lauren's suite, while Arie was greeted with alcohol, poker chips and cigars.

The entire group apparently went clubbing at the nightclub TAO, and according to People, members of the party were spotted at the following local establishments: Chica, Buddy V's, Black Tap Craft Burgers and Beer, and Yardbird Southern Table & Bar.

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An image also spoke for itself when Arie and Lauren embraced in front of a giant red display of the word "love."

Lauren, who is reportedly pursuing a career in real estate, and the racecar driver purchased a home together in Phoenix, AZ, in April 2018, just one month after getting engaged on The Bachelor: After the Final Rose special on ABC.
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Arie popped the question after ending his first engagement to the actual winner of The Bachelor's 22nd season, Becca Kufrin, who went on to star on The Bachelorette's fourteenth season.

Arie and Lauren, who announced last week they're expecting their first child together, will reportedly be getting married at the Haiku Mill in Maui, a historical venue reportedly famed for its lush gardens and hanging vines, in January 2019.

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About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.