'American Idol' Winner Lee DeWyze Engaged

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The singer popped the question to model-actress Jonna Walsh at Disney World in Orlando.

Lee DeWyze is ready to walk down the aisle.

The winner of American Idol's ninth season is engaged to model-actress Jonna Walsh. He told People that he proposed July 16 on a private yacht as fireworks from Orlando's Disney World went off overheard.

"Jonna is a Disney freak," he says. "They were playing love songs on the boat, and I got down on my knee and asked her. I had a speech prepared but it all went out the window so I just asked her. She started crying and I said, 'Is that a yes?'"

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The two have been dating since October, when they met while shooting a video for his single "Sweet Serendipity."

"When you know, you know," he said of their eight-month courtship. "We both feel that way. We don't need to be together 20 years before we figure it out."

They are planning a wedding for fall 2012.

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DeWyze was crowned Idol champ in 2010. His first post-Idol album, Live It Up, was released in November.

Walsh's credits include guest-starring roles on the TV shows No Ordinary Family and CSI: NY and an appearance in the movie Couples Retreat.