Kristin Cavallari returns engagement ring to ex

Kristin Cavallari is washing that man right out of her hair — and off her ring finger, too.

After a whirlwind month of engagement parties, runway shows, wedding dress photos and an unexpected break-up, the reality star doesn't want any reminders of her ex-fiancé Jay Cutler.

Her first step? Returning the engagement ring.

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A source close to the newly single gal confirms that she gave the ring back to the pro football player, weeks after he called off their nuptials.

The news will hopefully provide some closure for the "Laguna Beach" babe. It was less than a month ago that the duo released their wedding registry, but as time went on, sources say the pair was drifting apart.

"She noticed a change in him," an insider told Life & Style magazine. "He suddenly became more supportive of her career. Up till then, he'd always talked about it coming to an end once they got married. It was like Jay knew he was leaving the relationship and didn't want Kristin to miss out on great opportunities in L.A."

But at the end of the day, it's the Chicago Bears quarterback who's missing out.

"Going to Greece thursday ... cannot wait!!!" she tweeted just yesterday.

At least she doesn't have to worry about any awkward ring tan lines!

WATCH: Kristin Cavallari's Wedding Dress Whoops