'DWTS' Pro Allison Holker and Husband Stephen 'tWitch' Boss Welcome Daughter

Welcome to the world, Baby Boss!

And baby makes five. Allison Holker and Stephen "tWitch" Boss welcomed their second child together, a daughter named Zaia. The couple adorably posted identical photos on Instagram, with slightly different captions. Holker's announced, "ZAIA BOSS 9 lbs 3 oz -- 21 inches long. Healthy beautiful angel."

The couple announced live on "Ellen" (where tWitch is a DJ) back in May that they were expecting their second child together. They have a son, Maddox (3 1/2) and Holker has a daughter, Weslie (11) with an ex.

The family is highly active on Instagram and frequently post synchronized dance videos. Just days before the birth, tWitch posted a beautiful tribute to his very pregnant wife accompanied by a video of them dancing. "@allisonholker you are a phenomenal woman. A rockstar. I'm in awe of you. This baby has no idea how lucky she is to have a mom like you. So here it is, one last dance as a trio in this way. Let's do this." Talk about couple goals.

Holker appeared on Season 2 of "So You Think You Can Dance" then returned as an All Star for many seasons. Back in 2014, Allison was announced as one of the professional dancers on the 19th season of "Dancing With the Stars." She's since appeared in seasons 20, 21 and 23. Boss was also a contestant on "So You Think You Can Dance," placing 2nd in Season 4. He too was an All Star and eventually served as Team Captain for "Team Street" in Season 12.

Holker and Boss married at Nigel Lythgoe's Villa San Juliette Vineyard and Winery in Paso Robles on December 10, 2013. Congrats to the beautiful couple and family!