After popping the question earlier this month … 2010 American Idol winner Lee DeWyze has gotten engaged to his actress/model girlfriend Joanna Walsh!

DeWyze proposed to Walsh under a firework display on a private yacht with champagne at Disney World in Orlando.

“Joanna is a Disney freak,” the 25-year-old AI alum exclusively told People.com. “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?'”

DeWyze and Walsh met last October on the set of DeWyze’s video for his single “Sweet Serendipity.”

“We were casting and I saw her and said, ‘Let’s go with her.’ I thought she was cute,” Lee said.

The newly engaged pair are set to tie the knot in the Fall of 2012.