Kristin Cavallari FLAUNTS Her Engagement Ring

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Kristin Cavallari has reconnected with Chicago Bears quarterback Jay Cutler, and she's got the ring to prove it!

The former Hills hottie, 24, and Cutler, 28, had called off their engagement back in July -- three months after he had popped the question.

Now that their engagement is officially back on, Ms. Cavallari is proud to show off her 5.2-carat engagement ring bling. As for the photo, an eyewitness tells L&S:

“Kristin looked incredibly happy. She was definitely making a point to show off her engagement ring and couldn’t stop smiling.”

Kristin tells the magazine that she can't decide if she wants an intimate wedding or a huge affair.