Kristin Cavallari is ''counting down the days'' until she gives birth.

The former 'The Hills' star and her husband Jay Cutler are expecting a baby boy - their second child together - in April, and the blonde beauty admits she can't wait to see the tiny tot for the first time.

She said: ''[I'm] counting down the days.''

The 27-year-old actress insists she's trying to eat the same stuff she was eating before she fell pregnant and has been doing home workouts in a bid to stay fit and healthy.

She quipped: ''I feel like I have a bowling ball in my stomach.''

She added: ''I'm eating the same I normally do, and I'm working out but I'm not killing myself. I just don't use it as an excuse to go crazy, I guess. I've been doing videos at home and I've been doing lots of squats and lunges and really trying to focus on my legs and my butt.''

However, Kristin, who also has Camden Jack, 17 months, with her NFL star husband, hasn't been able to stay away from the calorific treats, but she admits she has always had a sweet tooth.

She explained to Us Magazine: ''I crave sweet things, but it's no different than when I'm not pregnant. I pretty much have dark chocolate every day because I don't think it's bad for you, and we get this coconut bliss ice cream made with coconut milk. I'll eat that a lot. It's amazing. When we go out to eat, Jay and I always get dessert. He has a sweet tooth, as well.''