Hilary Duff's Fit & Flexible Pregnancy

One thing's for sure – Hilary Duff believes in an active pregnancy! As she often is, the mom-to-be was seen leaving an exercise studio – this time it was a Pilates class in Toluca Lake, Calif. on Thursday (December 15).

And her attention to fitness is paying off. Hilary recently told E! that she's feeling great and relishing every moment of her pregnancy. "I think it's such a miracle," she said. "I feel so lucky that I've had an easy pregnancy and hope it stays that way. I think feeling the baby move and getting those little kicks…seeing it happen through your shirt or looking at your belly, it's like, wow, there's a life inside of me.

"It's a piece of my husband and me and it's really wild. It's really exciting to think about the future and also a little scary…but so exciting at the same time."

The Lizzie McGuire star says for her and hubby Mike Comrie, the anticipation is overwhelmingly exciting. "We're giddy when we talk about it," she laughs. "We daydream about what our future is going to be like and what our child is going to look like and the little personality it's going to have. I think that's the craziest part."