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Olivia Campbell's fear of flying and work schedule almost prevented her from boarding an airplane with her then-boyfriend, Miles Steinbach, last Saturday in Montana.

It's a good thing Campbell, 20, of Bowman's Corner, was convinced by Steinbach to get over her fear and come on board because he delivered the surprise of a lifetime.

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Steinbach, 23, had arranged to fly Campbell over a grain field on his family's property so that she could see the marriage proposal he had plowed into the field.

"I was looking out the window and I saw a discoloration in one of the fields and was looking really close but didn't want to make a big deal out of it," Campbell, a college student, told GoodMorningAmerica.com. "We started to get closer and I saw the word marry and I thought, 'Oh my gosh this can't be happening. This stuff doesn't happen to me.'"

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Plowed into the field below were the words, "Liva - Will You Marry Me?"

"I turned around and Miles was holding a ring and smiling at me and said, 'Will you marry me?,'" Campbell said. "I was, of course, screaming and said yes."

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It was a surprise that Steinbach, a rancher, had been planning for the past month. It took him and his uncle about one hour in a plow to carve out the question, relying at first on GPS and then just eyeballing it, according to Campbell.

Steinbach then had to wait until the unpredictable Montana weather would allow the couple to fly in one of his friend's planes.

"My whole family and my friends knew about it but they just didn't know when it was going to happen," she said. "Miles snuck out Friday night and told them, 'We're going flying tomorrow," and that was the code for he's going to ask me."

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Campbell and Steinbach, who have been dating for more than four years, plan to hold off on their wedding until 2015, once Campbell has graduated from college.

In the meantime, Campbell says she is still shaking from her "out of a movie" proposal and wondering what her fiancé may have planned for their wedding.

"Boy, I don't know," she said. "Who knows what that kid has up his sleeve. He's very surprising."