Kristin Cavallari wants another baby.

The former 'The Hills' star, who has sons, Camden, two, and Jaxon, three months, with her NFL star husband, Jay Cutler, admits ''motherhood is a lot of work'' but hopes to expand their family in the future.

The 27-year-old jewellery and shoe designer told Chicago's Michigan Avenue magazine: ''We love having kids, so I do think we'll end up having another one but then we're done.''

She added: ''Being pregnant for a full nine months isn't the best thing in the world.''

The blonde beauty has her hands full with her youngest son, who hasn't settled into a regular sleeping schedule yet.

She said: ''He's a happy baby, except that he's not a great napper, so I'm working on trying to get him to take better naps right now which is all I can really ask for.

''When Camden's going down, Jax is just waking up to eat and play, so there's literally no time. You have zero time to yourself.''

But Kristin feels much more confident with her second child.

She said: ''Well, it's a lot easier in the sense that you know what to do and expect, so you have a lot more confidence.

''Plus, you're definitely more relaxed with the second one because you're not stressed out by questioning everything that you're doing.''