Kristin Cavallari EngagedKristin Cavallari got more than a few days of relaxation while on vacation with boyfriend Jay Cutler -- she also got an engagement ring out of it!

The Chicago Bears quarterback, 27, popped the question over the weekend to the 24-year-old former star of "Laguna Beach" and "The Hills" in Cabo San Lucas ... and she said "Yes," according to People.

The couple, who recently went on a trip to Kenya together for charity, has been dating since last fall.

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