Allison Holker and her husband, Stephen "tWitch" Boss from So You Think You Can Dance, have welcomed a baby boy.

The Dancing with the Stars professional dancer gave birth to her first child with Boss on Easter Sunday and they named him Maddox Laurel Boss, E! News reported.

"[Maddox's birth] was truly an unforgettable moment and we are grateful to everyone that shared in the experience and made it so monumental. Our family feels full," the couple said in a statement to E! News. "Maddox already has the best big sister Weslie, they have already bonded and share a truly beautiful love."

Maddox, who weighed 8 pounds and 15 ounces at his birth and measured 22 inches long, joins Holker's seven-year-old daughter from a previous relationship.

Holker and Boss first announced the sex of their baby in early December by cutting into a gender-reveal cake with blue frosting.

Holker revealed she was pregnant during an October broadcast of Dancing with the Stars' 21st season. While being interviewed backstage by co-host Erin Andrews following her performance with celebrity partner Andy Grammer, Holker wanted to discuss the night's "Most Memorable Year" theme.

"As a pro... [it's] really such a special time because we get to celebrate someone's beautiful story and share it with the world..." Holker told Andrews before asking Boss and Weslie to join her. "And 2015 is actually turning out to be such a memorable year for us because we actually recently found out that I'm pregnant!"

Married by SYTYCD co-executive producer Jeff Thacker, the couple exchanged vows at SYTYCD creator and judge Nigel Lythgoe's California vineyard and winery in December 2013.

Holker joined Dancing with the Stars as a pro for Season 19. She was also a Top 8 finalist on the second season of So You Think You Can Dance.

Boss 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. Boss also just served as team captain of the "Street" dancers on last summer's edition of SYTYCD.