Indianapolis 500 and Dancing With the Stars‘ season four winner Helio Castroneves and his girlfriend Adriana Henao have just announced to be expecting their first child, a girl, in January 2010.

“This year started very difficult,” Castroneves said, referring to the tax evasion charges he was acquitted of in April. “The middle was kind of a ‘Wow!’ and now this. This is a great ending for the book.”

The couple revealed they haven’t really thought about marriage but they think that will be the “natural next step” in their relationship. Helio and Adriana are so happy that they already have a named for their little girl – no, not Indy but she will be named Mikaella.

Adriana Henao & Helio Castroneves Pictures