Ashley Tisdale is Engaged!

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Ashley Tisdale is officially off the market!

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A rep for the Scary Movie V actress confirms to People that Tisdale, 28, and her musician beau Christopher French are engaged.

"Best night of my life," Tisdale tweeted on Thursday night, possibly referring to her engagement. "We're on top of the world."

The two officially stepped out as a couple in December 2012 when they were snapped at an Apple Store in Los Angeles.