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Reality TV star-turned-fashion icon Kristin Cavallari is not enjoying her second pregnancy, revealing she feels "gross" and unsexy.

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The former "The Hills" star is expecting her second child with sportsman husband Jay Cutler and admits she's struggling as a mum-to-be.

Cavallari tells In Touch magazine, "You just feel gross. I live in leggings. I need to get it together and maybe put in a little effort to feel better about myself."

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"I'm still really tired. It gets better after the first trimester, but it never really goes away."

She is scheduled to give birth in spring 2014 and hopes she gets back to feeling like her old self again faster than she did after baby Camden was born 17 months ago.

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She adds, "Breast-feeding helped me last time, but it took me a solid seven months to feel good in my body again."