Arie Luyendyk Jr.'s fiancée Lauren Burnham is pregnant with first child

Another Bachelor baby is on the way!

Arie Luyendyk Jr. and Lauren Burnham, who are set to marry in January, are expecting their first child, ET can confirm.

“I kind of had a feeling that I might be pregnant. So my friend insisted on bringing a pregnancy test over,” Burnham, 26, tells Us Weekly, adding that she made her fiancé read the results. “Arie came out with the test in his hand and tears in his eyes. He was like, ‘You’re pregnant!’”

In a sweet Instagram post, Burnham showed off sonogram photos of their little one. Wearing a gray sweater dress, Burnham is glowing as she plants a sweet kiss on Luyendyk, 37.

"Our greatest adventure begins June 2019!👶🏼," Burnham captioned the snap.

Luyendyk expressed his excitement as well, posting two pics with Burnham and the sonogram photos.

"Nothing compares, absolutely nothing compares to the moment you find out you’re going to be a dad!" Luyendyk gushed. "We cried, we laughed and it really was such a special moment for us, we’re so freakin’ happy!"

The couple got engaged earlier this year following the 22nd season of The Bachelor. Luyendyk initially popped the question to Becca Kufrin on the show, before changing his mind and choosing Burnham. Following the controversy, the pair officially got engaged on the After The Final Rose special in March.

In May, the duo announced their wedding date and location on The View. The nuptials will take place in Maui, Hawaii, at the Haiku Mill on Jan. 12. The tropical affair will be relatively small, with 120 guests in attendance for the destination ceremony.

Since announcing their wedding date, the couple's been in full planning mode, releasing stunning engagement portraits, celebrating with a gorgeous bridal shower and revealing the invites for their big day.

ET caught up with Luyendyk last month, where he revealed that the couple were planning on waiting until after their wedding to start a family.

"Obviously first the wedding, but we're really excited to start a family," he said at the time. "But I think we're just trying to get through this section. Obviously the wedding is such a huge part of our lives and it's going to be such a beautiful day."

"But yeah, we're excited to start a family and we've bought a beautiful house and we're really settling in Arizona. But yeah, one step at a time," he added.

Luyendyk also spoke about his wedding look, a Kenneth Cole tux. The reality star said his attire will be "very clean [and] simple," while having "something with a little bit extra."

ET also spoke to the blushing bride, who gave a bit of insight into her custom made "elegant and understated" gown by designer Hayley Paige, something Luyendyk doesn't "have a whole lot of input" in.

"I vibe with her so well. We have very similar interests and style. I’m very girly. She’s very girly. She likes glitter. I like glitter, so it works. She understands what I’m looking for," Burnham said of the designer. "...Oh, my gosh, it’s stunning. She is amazing. I literally get so excited just thinking about it because she’s great."

As for her dream wedding, which she previously said was "relatively stress-free" to plan, Burnham couldn't stop gushing.

"Girls dream about getting married in Hawaii," she mused. "It’s a beautiful destination wedding spot, and I’m very lucky."