Pregnant star Hilary Duff feels like an "alien has taken over" her body.

The singer-and-actress is expecting her first child with husband MIKE COMRIE and while she says her pregnancy is going smoothly, she admits it is odd not being in control of her body, feelings and emotions.

She said: "I feel really good. It's been pretty easy, and I haven't gotten sick at all, and I don't have too many cravings. It's so different. It's literally like an alien has taken over your body. One day I'll have a good day, and one day I'll have a bad day, and it kinda goes like that."

Hilary is "going crazy" to find out the sex of her child so she can start preparing for the baby's arrival.

She told MTV News: "I can already find out, but I want my mom and my sister to be there, but they've both been out of town. When they are both in the same city and we're all there, then we'll find out.

"I'm going crazy! Pregnancy is kind of boring. There's not too much you can do, so those dates are very important to you, so you count down."

While she hasn't found out the gender of her unborn child yet, the former 'Lizzie Maguire' star is convinced she is carrying a boy.

She said: "Everyone else says it's a girl, but I think it's a boy. I'd be happy with a girl, but my sister's like, 'You can't keep saying that, because then when it's a girl, everyone's gonna be like, 'You really wanted a boy!' I don't care what I get, but every time I think about it or dream about it, I see a boy."

However, the 24-year-old star and ice-hockey player Mike, 31, are currently stumped trying to choose a name for the tot.

She explained: "If we give the baby kind of a unique name, we need to give it a normal middle name in case it hates it and wants to like fit in better and then maybe we just need to go totally traditional. We're like, 'How can we be naming it before we even see it?' There's so much to think about!"