VIDEO : Hilary Duff Had This 'Sad' Conversation With Son Luca About Baby No. 2

When Hilary Duff told her 6-year-old son Luca that he was going to be a big brother, he wasn?t immediately thrilled. In fact, Duff says, he?s ?a little nervous? about the prospect of having a little sister.

The Huffington Post says Duff announced in June that she?s expecting her second child with boyfriend Matthew Koma. It's the couple's first child together, a daughter. Duff says Luca has come around to the idea of another person in the fold.