Nightgown, Princess Ann from Roman Holiday (1953)

Princess Ann: I hate this nightgown. I hate all my nightgowns, and I hate all my underwear too.
Countess: My dear, you have lovely things.
Princess Ann: But I'm not two hundred years old. Why can't I sleep in pajamas?
Countess: Pajamas?
Princess Ann: Just the top part. Did you know that there are people who sleep with absolutely nothing on at all?
Countess: I rejoice to say I do not.

- Princess Ann from Roman Holiday (1953)

Roman Holiday is a 1953 romantic comedy film about a bored and sheltered princess who escapes her guardians and falls in love with an American newsman in Rome.

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http://en.wikiquote.org/wiki/Roman_Holiday