The 14th Amendment of the U.S. Constitution guarantees citizenship at birth to almost all individuals born in the United States or in U.S. jurisdictions, according to the principle of jus soli(right of birthplace). Certain individuals born in the United States, such as children of foreign heads of state or children of foreign diplomats, do not obtain U.S. citizenship under jus soli.
If you are a U.S. citizen and at least 21 years old, you are eligible to petition to bring your parents to live and work permanently in the United States.