Kristin Cavallari just dropped some sad and actually shocking news ... she and Jay Cutler are throwing in the towel on their decade-long relationship.
Kristin just said, "With great sadness, after 10 years together we have come to a loving conclusion to get a divorce. We have nothing but love and respect for one another and are deeply grateful for the years shared, memories made, and the children we are so proud of."
She wanted to make it clear ... nothing untoward happened -- "This is just the situation of two people growing apart.