Before being “Han Solo”, Harrison Ford was a carpenter. Many people didn’t know the true story of how he got the job until Star Wars Celebration in 2017.
According to Harrison Ford, he previously worked for Lucas in American Graffiti but during the time that Star Wars was being developed, Ford was doing carpentry.
And one day he was hanging a door for Francis Ford Coppola and things proceeded then:
I was actually installing a door for Francis Ford Coppola as a favor to his art director, who had built the door but couldn’t find anyone to install it. And I said I’ll do it, but I’m only gonna do it at night because I don’t want people walking through there while I’m not trying to do the thing. And one morning, in walked, while I was finishing up the door, in walked George with Richard Dreyfuss. George walked in, and it was a surprise, and I thought it was an interview for a new science fiction film. Anyway, we just chatted and said hello.
That’s the whole story.
George Lucas thought Harrison Ford was just waiting outside pretending to work on something just to get his attention. Ford didn’t think and act so, of course.