Lindsay Arnold 's troupe is expanding.

The Dancing With the Stars alum is pregnant with her and husband Sam Cusick 's third baby, who will join daughters Sage , 5, and June 2.

"BABY CUSICK #3 IS ON THE WAY," Lindsay wrote on Instagram Nov. 24, sharing photos of herself holding a sonogram next to her family. "We could not feel more blessed, grateful, and excited."

She added in a message to her little one on the way, "We love you so much already baby and we can't wait to meet you!!"

And the 31-year-old's DWTS family was equally excited, with Witney Carson writing in the comments section, "I CANT WAIT FOR BABY CUSICK!!!"

"CONGRATULATIONS to my fav family," Jenna Johnson shared, while Sasha Farbe r commented, "Itsssss happening!!!!"

Lindsay's younger sister Rylee

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