People Staff
March 19, 2012 02:20 PM

Her belly may be growing fast, but Kristin Cavallari is keeping the rest of her body trim!

The reality star, who is expecting her first child with fiancé Jay Cutler, got some cardio into her Wednesday workout in West Hollywood with a little help from her trusty canine companion, Bardot.

Bardot (so beloved that Cavallari named her first shoe design after the dog) took the lead on the walk. Cavallari, who sported a little pre-St. Patrick’s Day spirit with the green in her workout gear, stayed behind and frequently checked her phone.

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