(Nikki Nelson/WENN.com)

Wasn't meant to be.

In this week's Throwback Thursday Soaps.com takes readers back to June 23, 2003 when Billy Abbott and Mackenzie Browning wed only to have their marriage annulled the very next day…

Victor and Nikki are currently celebrating their fourth marriage, but ten years ago another couple's nuptials were followed by devastating news. Billy (then played by Ryan Brown) and Mac (then played by Kelly Kruger) ran in the same circle when they attended Walnut Grove Academy. The two never got along. However, their feelings became evident when both were crowned king and queen of the prom and later shared a kiss.

The couple enrolled at Genoa City University and moved into a loft apartment with Raul Guittierez and Brittany Hodges. It wasn't long before Billy proposed and a wedding followed. What was supposed to be one of the happiest moments of their lives turned into utter devastation. Jill arrived with news that Billy and Mac were cousins - having believed that Jill was Katherine's daughter. Their marriage was annulled the next day, and the two left Genoa City separately.

Do you remember if Billy and Mac consummated their marriage? Vote below.

Also, vote in our Throwback Thursday B&B Poll: Amber and CJ and tells us who has been your favorite split-personalty diva through Soaps.com's Weekly Soap Debate: Multiple Personalities Storylines

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- Amy Mistretta