Newlyweds Holly Montag & Richie Wilson Expecting First Child 3 Months After Tying The Knot [DETAILS]

MStars News has learned that The Hills star Holly Montag, the sister of Heidi Pratt, is expecting her first child with husband Richie Wilson.

According to US Magazine, the newlyweds' pregnancy was revealed by Heidi, 28, via Twitter over the holidays, as she included a photo of her sister's baby bump.

"Couldn't be happier for my sister @hollymontag Christmas miracle!!!!!" The Hills alum wrote. "Love you!!!"

https://t.co/d1xV6DFCu0 Couldn't be happier for my sister @hollymontag Christmas miracle!!!!! Love you!!!

— Heidi Montag (@heidimontag) December 23, 2014

This will be the couple's first child and an exciting addition to their new marriage. MStars News previously reported that Holly and Richie were married in their hometown of Crested Butte, Colo., back in September.

"It could not have been more intimate and elegant," the bride previously described her wedding. "Being surrounded by the mountains as the trees are just beginning to turn for fall was absolutely dreamy. It could not have been more magical or perfect for Richie and me."

Heidi stated at that time, "I couldn't be happier for my sister finding the love of her life and soul mate. I pray and wish them all the blessings and happiness in the world. She deserves it!"

"It was the most beautiful, majestic, mountain fairy tale wedding," Heidi also said. "I was trying to push back my joyful tears throughout the ceremony and evening. It was simply perfect and stunning. I am so blessed to have been a part of it."

Last time we checked, Heidi and her husband, Spencer Pratt, were trying to have a little one of their own. After hanging out with their costars of Marriage Boot Camp: Reality Stars Natalie Nunn and her husband Jacob Payne, who are expecting a little one sometime this year, Heidi said:

"Its not secret that Spencer and I have been debating about children and we are on different sides of the fence on that," Heidi previously stated. "So I just kind of wanted to come there and have someone bring us to a middle ground of 'Never' and 'Now,' so we've come to a consensus."

"I think that it was just scary for him, the feeling that he was going to lose me a little bit and just not knowing if he was capable to be able to provide for a child right now," Montag reveals. "We've come to a pretty good understanding and definitely in the near future."