Via Gamesradar.com:

The Star Wars movies are full of famous lines, from looking for droids to clarifying paternity, but there’s one that always stands out:

“I know.”

It shouldn’t work – when a partner says they love you for God’s sake repeat it back, or prepare to start having ‘the talk.’ But when Han Solo answers with it? Sure, he’s literally a rogue, what else would he say?

But that wasn’t the line as George Lucas wrote it. And, as it turns out, Harrison Ford explains, “he went apeshit” when he found out Ford and Empire Strikes Back director Irvin Kershner had conspired to do something different.

“I love you, too” was the original line explains Kershner in a 2010 Vanity Fair interview. “I shot the line and it just didn’t seem right for the character of Han Solo.” So Ford, Kershner and the cast “worked on the scene on the set,” trying different things and searching out the right line. “We were into the lunch break and I said to Harrison try it again and just do whatever comes to mind. That is when Ford said the line, ‘I know.’ After the take, I said to my assistant director, David Tomblin, ‘It’s a wrap.'”

As Kershner puts it that was “the perfect Han Solo remark,” but George Lucas was less certain. When he saw the edit with the new line he immediately spoke up: “Wait a minute, wait a minute. That’s not the line in the script,” was the reaction according to Kershner.

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