Christopher French and Ashley Tisdale

Ashley Tisdale is engaged to boyfriend Christopher French, Life & Style Weekly reports.

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French, a musician, proposed to Tisdale, 28, on the 103rd floor of the Empire State Building Thursday evening. "Best night of my life. We're on top of the world," the High School Musical star tweeted.

The couple have been dating since December. Tisdale will next be seen in Scary Movie 5 and be heard voicing the title role of Sabrina: Secrets of a Teenage Witch, The Hub's new animated series.