June 14, 2016 02:20 PM

Tess Holliday is a mom again!

The size 22 model and her fiancé Nick Holliday welcomed their first child together, a baby boy, on Monday, June 6, her rep confirms to PEOPLE exclusively.

Son Bowie Juniper Holliday weighed 8 lbs., 10 oz., and measured 22 inches long.

Courtesy Nick Holliday

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Holliday, 30, who is already mom to 10-year-old son Rylee from a previous relationship, confirmed her second pregnancy to PEOPLE exclusively in January.

But even though she has been pregnant before, it’s almost like it’s the first time for the body-positive model, who recently participated in a stunning nude pregnancy photoshoot for the Telegraph and currently has a clothing line with Canadian retailer Penningtons.

“It’s been 10 years since I had a kid, so there are so many things that are new,” she told PEOPLE. “My friends that have babies are posting all of these new swings and breastfeeding techniques and new bottles, and it’s really overwhelming because I thought, ‘I’ve already done all this,’ but it feels like I haven’t. I’m having to relearn a lot!”

Holliday and Nick celebrated their growing family in May with a sweet Hawaiian-themed baby shower. At the bash — which, according to Holliday, was completely orchestrated by Nick — guests noshed on treats like vegan cookies and doughnuts.

More recently, Holliday shared a nude bathroom selfie of her pregnancy belly, writing, “When people say to me, ‘I can’t tell you’re pregnant.’ I will continue to live unapologetically, to thrive in this body, prove the naysayers wrong & laugh at the ignorance.”

“I’m really excited to be doing it again and have support, and be able to enjoy having a baby, because I couldn’t last time [with Rylee],” the former PEOPLE cover star said following her pregnancy announcement.

“I think it really solidifies the two halves of our family coming together,” Nick added. “It will be nice to have the family more blended.”

Jen Juneau with reporting by Kate Stroup

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