Dancing with the Stars pro Allison Holker has revealed she's going to be dancing in a trio with celebrity partner Andy Grammer for the rest of the season.

During Monday night's Dancing with the Stars broadcast, Holker made a big announcement while being interviewed backstage by co-host Erin Andrews following her performance with Grammer. The couple danced a cha cha routine in honor of Grammer's mother who had died of breast cancer in 2009 for the show's "Most Memorable Year" theme.

"As a pro, 'Most Memorable Year' is really such a special time because we get to celebrate someone's beautiful story and share it with the world," Holker told Andrews with Grammer at her side.

"But I actually have a special guest here," Holker said as she welcomed her seven-year-old daughter from a previous relationship and husband Stephen "tWitch" Boss to join her.

"This is my daughter. This is my husband. And 2015 is actually turning out to be such a memorable year for us because we actually recently found out that I'm pregnant!"

"We got a mama in the ballroom!" Andrews excitedly pointed out as the DWTS cast, audience and judges cheered. "Congratulations to all three of you."

Andrews then continued, "So I have to ask. What does this mean for the competition?"

"I am so about this for Andy and I want him to feel the most comfortable, but I am here. I am here 100% of the way for him," Holker, 27, insisted.

"There's three of us now," Grammer noted with a smile. "We're the only team that has three and it's allowed!"

"Every single week is a trio," Holker laughed. "I hope everyone's okay with that."

"We're all okay with it. Congratulations! We love you," Andrews noted.

Married by SYTYCD co-executive producer Jeff Thacker, Holker and tWitch exchanged vows at SYTYCD creator and judge Nigel Lythgoe's California vineyard and winery in December 2013. Fellow DWTS pro Anna Trebunskaya attended their wedding.

Holker joined Dancing with the Stars as a pro for Season 19. She was also a Top 8 finalist on the second season of SYTYCD.
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tWitch, 33, finished as the runner-up of SYTYCD's fourth edition. A romance sparked in 2010 when he and Holker both starred on the seventh season of the series as all-star partners for the contestants. tWitch just served as the "Street" dancers' team captain on the latest season of SYTYCD.

About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.