Another relationship bites the dust!

First there was Paris Hilton and Cy Waits, then George Clooney and Elisabetta Canalis -- and now, add Lauren Conrad and Kyle Howard to the split celebs list!

The former star of "The Hills," 25, and 33-year-old "My Boys" star Howard have reportedly called it quits after dating for three years.

Though they were dating while she appeared on the MTV reality show, Conrad kept their relationship private -- and away from the camera.

Check out the couple above ... before the split!

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