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Ivanka Trump got engaged to her longtime beau Jared Kushner last night, a rep for the couple confirms to

"I'm very happy about it," Donald Trump tells "They make a magnificent couple."

Ivanka, 27, posted the news on Twitter earlier today.

"I got engaged last night...truly the happiest day of my life!!!" she wrote.

A source tells Us: "The ring is stunning!"

The couple have been dating since 2007. They briefly split, but reconciled in July 2008.

Trump, a vice president at the Trump Organization, converted to Judaism for Kushner, the publisher of the New York Observer.

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