sweep someone off his feet

Apparently she met Laurent on a business trip and he swept her off her feet.

 If you 'sweep someone off their feet' they quickly fall deeply in love with you.

sweep someone off his feet
（人）の足をさらう、（人）をなぎ倒す、（人）の心を奪う、（人）を夢中にさせる

He sings very well, so he'll sweep ［carry］ you off your feet. 
彼はとても歌うのが上手だから、心を奪われちゃうよ。

sweep someone off his feet and into one's arms
（人）の足をさらって自分の両腕に抱きかかえる

I'm not here to sweep her off her feet.
彼女を誘惑するためにここに来たわけではありません。

My prince has finally showed up to sweep me off my feet.
白馬に乗った王子様がついに現れた。

Some day Mr. Right will come along and sweep you off your feet.
いつか理想の男性がやって来て、あなたをの心を奪いますよ。