Check out former Dancing With the Stars champ Helio Castroneves' new baby girl.

On his Twitter page, he showed off some new pictures of Mikaella Castroneves, who was born Dec. 28 (the girl weighed in at 7 lbs., 3 oz. and measured 19 inches in length). Mom is Castroneves's girlfriend, Adriana Henao.

"Look how much hair!" Castroneves gushed of his girl. He also posted a shot of her taking a nap. "Ahhh... relaxing..." he wrote.

Castroneves Twittered that he has been "overwhelmed with so many messages" and thanked fans for their support.

He and Henao announced they were expecting in October.