She didn't know he was a Prince. She just thought he was an ordinary emigrant, but she loved him, so she married him.
9 seconds sound clip from the A King in New York (1957) movie soundboard.
You can hear this line at 01:17:41 in the Blu-ray version of the movie.
Quote context
[...]
- Oh no, I've been here a long time. Practically all my life.
- Sounds like a real American boy, don't he?
- Brooklyn! So your daddy wants you to have an American education?
- That's how the King became my uncle.
- That's why my father came to America, to give air and sunlight to his thoughts.
- The land of the free and the home of the brave was his inspiration.
[...]