Johnston and Bolden have been together for four years

Liz Johnston is going to be a mom!

The 7 Little Johnstons star, 21, is pregnant and expecting her first baby with her partner Brice Bolden, a rep for the couple confirms to PEOPLE exclusively.

Johnston and Bolden posed for a sweet pregnancy announcement photo, which features the couple standing with their arms around each other in front of a sign with a sonogram picture that reads, “Baby Coming Nov 2023.”

“Welcoming our newest addition this fall, we couldn’t be more excited for Baby Bolden to arrive!” they tell PEOPLE.

On his Instagram page, Bolden has shared many updates about his relationship with Johnston, including a few festive autumn photos from last October. The couple posed together in the photos with a dog, with Bolden writing in the caption, “My life 🥰.”

In December, Johnston shared a few group family photos, writing, “Merry Christmas Eve🎄❤️,” in her caption.

For her 21st birthday this past year, Johnston posted a carousel of photos from her party at a ranch. Wearing a shirt jacket and black pants, she wrote “21st Hoedown,” in celebration of her special day.