The Bachelor alum Arie Luyendyk Jr. successfully surprised his wife Lauren Burnham with a backyard baby shower for their twins on the way.

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Arie, 39, shared photos from the baby shower he secretly planned and threw for Lauren, 29, who is currently 29 weeks along in her pregnancy with one boy and one girl.

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"Pulled it off everyone! Happy to celebrate you and our babies today," Arie captioned the slideshow.

Arie and Lauren, with her baby bump on full display in a light peach maxi dress, posed in front of a "Baby L & S" sign, which appears to hint at the twins' names, as well as inside a white bounce castle set up for the couple's 22-month-old daughter Alessi Ren.

Arie also posted a picture of some delicious food and Lauren smiling with a few of her girlfriends.

Lauren commented on Arie's post, "Still can't believe I never caught on! There were so many signs."

On her own Instagram account, Lauren posted similar pictures, including one of her munching on pink cotton candy alongside a pal who had a stick of blue cotton candy in hand.

"Never been more surprised than I was walking into my backyard today. love all of you ppl so much & @luyendyktwins. We can't wait to meet you!" Lauren gushed.

On the Instagram account the couple had created for their, Arie provided a little more insight into why he decided to surprise his wife with a baby shower.

"29 weeks! Today we spent the day celebrating you two. I was so happy to surprise Mom with a baby shower and she had no idea!" Arie began.

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"This past week was a tough one for her so I thought this would be the best way to put a smile on her face. You have so many people out here that already love you so much and can't wait to meet you! So this week I got to finally see your little faces and you two look so dang cute."
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Arie continued, "I have to say I see a lot of your big sister in those pictures but trust me she's cute so that's a good thing. Also baby girl you are facing down now so we are crossing our fingers your brother will flip too!"

"That's all for now but keep growing and we'll hopefully see you in 9 weeks! Love you, Dad," he concluded.

Arie and Lauren, who recently bought a house in Hawaii and will be moving there soon, announced Lauren is pregnant with twins in December 2020, not long after Lauren suffered a miscarriage in May of last year.

The couple announced in January 2021 they will be welcoming another daughter as well as a son, due to arrive in this June.

Lauren finished Arie's season of The Bachelor in second place when Arie actually chose Becca Kufrin as his winner and popped the question to her during the Final Rose Ceremony, which aired in March 2018.

But weeks after getting engaged, Arie decided to dump Becca because he claimed he was still in love with Lauren, and so he begged Lauren for a second chance.

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Arie proposed marriage to Lauren in March 2018 on The Bachelor: After the Final Rose after Season 22 aired on ABC.

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The couple then moved into their first home together in Phoenix, AZ, in April of that year.

The pair announced they were expecting their first child together in November 2018 and revealed two months later that Lauren was pregnant with a baby girl.

Arie and Lauren tied the knot at Haiku Mill in Maui, Hawaii in January 2019 and then welcomed Alessi on May 29, 2019.

RELATED LINK: 'THE BACHELOR' FRANCHISE COUPLES NOW: WHO IS STILL TOGETHER?? (PHOTOS)

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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.