Kristin Cavallari's Bun In the Oven Excitement

Sticking with her usual workout routine now that she’s expecting, Kristin Cavallari was spotted leaving the gym in Los Angeles, CA earlier today (January 24).

Once her fitness session was through, the former “Hills’ hottie changed into some daytime wear and perched herself on a cement wall while waiting for her valeted car.

Shortly after announcing her baby news with fiance Jay Cutler, hundreds of Kristin's Twitter followers offered up congratulatory messages.

In response to the outpouring of well wishes, Miss Cavallari wrote, "Thanks for all the sweet messages! We are so excited for this little bun in the oven."

Meanwhile, her Chicago Bears Quarterback beau tweeted, "Thanks for all the tweets. We couldn't be more excited. We don't usually comment on our relationship but for the record I never broke up with Kristin. It's unfortunate some people are saying hurtful things during such a joyous moment in our life."

Enjoy the pictures of Kristin Cavallari heads to a workout in LA (January 24).