this is from University of Princeton site

Tips for International Students

Princeton welcomes applications from students around the world. We review all applications in the same manner, regardless of citizenship or country of residence.
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Princeton does not accept applications for admission from students who have already enrolled in a university. We do not have a transfer admission process, and we consider anyone who has begun university elsewhere to be a transfer applicant.

Princeton is need-blind for all applicants, U.S. citizens and non-citizens alike. Your family’s ability to pay for your university education is not a factor in our admission decision. Students who qualify for financial aid will receive a grant and a term-time job (7-8 hours per week) to meet their need as determined by the Financial Aid Office. Loans are not required in Princeton’s aid package.