Little People, Big World star Tori Roloff has posted a cute photo of her growing baby bump at 31 weeks.

Tori, who is expecting her first child with husband Zach Roloff, took to Instagram on Wednesday to provide her fans with a pregnancy update.

"It's been a while since I've posted one of these. #zandtpartyofthree," the TLC star captioned her mirror selfie in which she's wearing a black and white striped long-sleeve shirt with black pants.

In the picture, Tori wrote there have been "lots of baby hiccups" and the baby is "nesting in full force," adding that her boy is now the "size of a coconut."

Tori and Zach announced in November 2016 they're expecting Baby No. 1. Their son will be the first grandchild for Zach's parents, Matt Roloff and Amy Roloff, who also star on Little People, Big World and run Roloff Farm in Oregon.

Tori just enjoyed a baby shower on March 19, several weeks after the parents-to-be traveled to Maui for a babymoon.

The couple, who wed in July 2015, had revealed the baby's gender at a party on January 7 which 50 friends and family attended.

"Tori is the greatest teammate I will ever have. She [complements] me the best and pushes me the hardest. Keeps me motivated and reminds me of my goals. Love you babe-uh," Zach captioned a cute photo of the couple in which Tori was holding four blue and white balloons at the time.

Tori, who is of regular height, and her husband, who is a dwarf, anticipate their newborn will arrive in May 2017.